The hollow, muscular organ that maintains the circulation of the blood.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.
Pathological conditions involving the HEART including its structural and functional abnormalities.
The transference of a heart from one human or animal to another.
Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.
The heart of the fetus of any viviparous animal. It refers to the heart in the postembryonic period and is differentiated from the embryonic heart (HEART/embryology) only on the basis of time.
Flaps of tissue that prevent regurgitation of BLOOD from the HEART VENTRICLES to the HEART ATRIA or from the PULMONARY ARTERIES or AORTA to the ventricles.
The chambers of the heart, to which the BLOOD returns from the circulation.
Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.
The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow.
A procedure to stop the contraction of MYOCARDIUM during HEART SURGERY. It is usually achieved with the use of chemicals (CARDIOPLEGIC SOLUTIONS) or cold temperature (such as chilled perfusate).
Examinations used to diagnose and treat heart conditions.
Contractile activity of the MYOCARDIUM.
A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to narrowing of the coronary arteries (CORONARY ARTERY DISEASE), to obstruction by a thrombus (CORONARY THROMBOSIS), or less commonly, to diffuse narrowing of arterioles and other small vessels within the heart. Severe interruption of the blood supply to the myocardial tissue may result in necrosis of cardiac muscle (MYOCARDIAL INFARCTION).
Striated muscle cells found in the heart. They are derived from cardiac myoblasts (MYOBLASTS, CARDIAC).
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
A state of subnormal or depressed cardiac output at rest or during stress. It is a characteristic of CARDIOVASCULAR DISEASES, including congenital, valvular, rheumatic, hypertensive, coronary, and cardiomyopathic. The serious form of low cardiac output is characterized by marked reduction in STROKE VOLUME, and systemic vasoconstriction resulting in cold, pale, and sometimes cyanotic extremities.
The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance.
Elements of limited time intervals, contributing to particular results or situations.
A pumping mechanism that duplicates the output, rate, and blood pressure of the natural heart. It may replace the function of the entire heart or a portion of it, and may be an intracorporeal, extracorporeal, or paracorporeal heart. (Dorland, 28th ed)
Heart failure caused by abnormal myocardial contraction during SYSTOLE leading to defective cardiac emptying.
Treatment process involving the injection of fluid into an organ or tissue.
A form of CARDIAC MUSCLE disease that is characterized by ventricular dilation, VENTRICULAR DYSFUNCTION, and HEART FAILURE. Risk factors include SMOKING; ALCOHOL DRINKING; HYPERTENSION; INFECTION; PREGNANCY; and mutations in the LMNA gene encoding LAMIN TYPE A, a NUCLEAR LAMINA protein.
Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
General or unspecified injuries to the heart.
The heart rate of the FETUS. The normal range at term is between 120 and 160 beats per minute.
This structure includes the thin muscular atrial septum between the two HEART ATRIA, and the thick muscular ventricular septum between the two HEART VENTRICLES.
Agents that have a strengthening effect on the heart or that can increase cardiac output. They may be CARDIAC GLYCOSIDES; SYMPATHOMIMETICS; or other drugs. They are used after MYOCARDIAL INFARCT; CARDIAC SURGICAL PROCEDURES; in SHOCK; or in congestive heart failure (HEART FAILURE).
Cardiac manifestation of systemic rheumatological conditions, such as RHEUMATIC FEVER. Rheumatic heart disease can involve any part the heart, most often the HEART VALVES and the ENDOCARDIUM.
The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume.
A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS).
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
Damage to the MYOCARDIUM resulting from MYOCARDIAL REPERFUSION (restoration of blood flow to ischemic areas of the HEART.) Reperfusion takes place when there is spontaneous thrombolysis, THROMBOLYTIC THERAPY, collateral flow from other coronary vascular beds, or reversal of vasospasm.
Cessation of heart beat or MYOCARDIAL CONTRACTION. If it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
A device that substitutes for a heart valve. It may be composed of biological material (BIOPROSTHESIS) and/or synthetic material.
A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall.
Drugs that bind to but do not activate beta-adrenergic receptors thereby blocking the actions of beta-adrenergic agonists. Adrenergic beta-antagonists are used for treatment of hypertension, cardiac arrhythmias, angina pectoris, glaucoma, migraine headaches, and anxiety.
Heart failure caused by abnormal myocardial relaxation during DIASTOLE leading to defective cardiac filling.
A voluntary organization concerned with the prevention and treatment of heart and vascular diseases.
The geometric and structural changes that the HEART VENTRICLES undergo, usually following MYOCARDIAL INFARCTION. It comprises expansion of the infarct and dilatation of the healthy ventricle segments. While most prevalent in the left ventricle, it can also occur in the right ventricle.
The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
The ENTERIC NERVOUS SYSTEM; PARASYMPATHETIC NERVOUS SYSTEM; and SYMPATHETIC NERVOUS SYSTEM taken together. Generally speaking, the autonomic nervous system regulates the internal environment during both peaceful activity and physical or emotional stress. Autonomic activity is controlled and integrated by the CENTRAL NERVOUS SYSTEM, especially the HYPOTHALAMUS and the SOLITARY NUCLEUS, which receive information relayed from VISCERAL AFFERENTS.
Regulation of the rate of contraction of the heart muscles by an artificial pacemaker.
Abnormalities in any part of the HEART SEPTUM resulting in abnormal communication between the left and the right chambers of the heart. The abnormal blood flow inside the heart may be caused by defects in the ATRIAL SEPTUM, the VENTRICULAR SEPTUM, or both.
A condition caused by underdevelopment of the whole left half of the heart. It is characterized by hypoplasia of the left cardiac chambers (HEART ATRIUM; HEART VENTRICLE), the AORTA, the AORTIC VALVE, and the MITRAL VALVE. Severe symptoms appear in early infancy when DUCTUS ARTERIOSUS closes.
Tumors in any part of the heart. They include primary cardiac tumors and metastatic tumors to the heart. Their interference with normal cardiac functions can cause a wide variety of symptoms including HEART FAILURE; CARDIAC ARRHYTHMIAS; or EMBOLISM.
A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.
Diseases which have one or more of the following characteristics: they are permanent, leave residual disability, are caused by nonreversible pathological alteration, require special training of the patient for rehabilitation, or may be expected to require a long period of supervision, observation, or care. (Dictionary of Health Services Management, 2d ed)
Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports research program related to diseases of the heart, blood vessels, lung, and blood; blood resources; and SLEEP WAKE DISORDERS. From 1948 until October 10, 1969, it was known as the National Heart Institute. From June 25, 1976, it was the National Heart and Lung Institute. Since October 1997, the NHLBI has also had administrative responsibility for the NIH Woman's Health Initiative.
A PEPTIDE that is secreted by the BRAIN and the HEART ATRIA, stored mainly in cardiac ventricular MYOCARDIUM. It can cause NATRIURESIS; DIURESIS; VASODILATION; and inhibits secretion of RENIN and ALDOSTERONE. It improves heart function. It contains 32 AMINO ACIDS.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.
The pressure within a CARDIAC VENTRICLE. Ventricular pressure waveforms can be measured in the beating heart by catheterization or estimated using imaging techniques (e.g., DOPPLER ECHOCARDIOGRAPHY). The information is useful in evaluating the function of the MYOCARDIUM; CARDIAC VALVES; and PERICARDIUM, particularly with simultaneous measurement of other (e.g., aortic or atrial) pressures.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.
The thoracolumbar division of the autonomic nervous system. Sympathetic preganglionic fibers originate in neurons of the intermediolateral column of the spinal cord and project to the paravertebral and prevertebral ganglia, which in turn project to target organs. The sympathetic nervous system mediates the body's response to stressful situations, i.e., the fight or flight reactions. It often acts reciprocally to the parasympathetic system.
Theoretical representations that simulate the behavior or activity of the cardiovascular system, processes, or phenomena; includes the use of mathematical equations, computers and other electronic equipment.
Period of contraction of the HEART, especially of the HEART VENTRICLES.
The innermost layer of the heart, comprised of endothelial cells.
Post-systolic relaxation of the HEART, especially the HEART VENTRICLES.
Isopropyl analog of EPINEPHRINE; beta-sympathomimetic that acts on the heart, bronchi, skeletal muscle, alimentary tract, etc. It is used mainly as bronchodilator and heart stimulant.
AMINO ALCOHOLS containing the propanolamine (NH2CH2CHOHCH2) group and its derivatives.
Developmental abnormalities in any portion of the VENTRICULAR SEPTUM resulting in abnormal communications between the two lower chambers of the heart. Classification of ventricular septal defects is based on location of the communication, such as perimembranous, inlet, outlet (infundibular), central muscular, marginal muscular, or apical muscular defect.
Measurable and quantifiable biological parameters (e.g., specific enzyme concentration, specific hormone concentration, specific gene phenotype distribution in a population, presence of biological substances) which serve as indices for health- and physiology-related assessments, such as disease risk, psychiatric disorders, environmental exposure and its effects, disease diagnosis, metabolic processes, substance abuse, pregnancy, cell line development, epidemiologic studies, etc.
Exposure of myocardial tissue to brief, repeated periods of vascular occlusion in order to render the myocardium resistant to the deleterious effects of ISCHEMIA or REPERFUSION. The period of pre-exposure and the number of times the tissue is exposed to ischemia and reperfusion vary, the average being 3 to 5 minutes.
The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.
Inflammatory processes of the muscular walls of the heart (MYOCARDIUM) which result in injury to the cardiac muscle cells (MYOCYTES, CARDIAC). Manifestations range from subclinical to sudden death (DEATH, SUDDEN). Myocarditis in association with cardiac dysfunction is classified as inflammatory CARDIOMYOPATHY usually caused by INFECTION, autoimmune diseases, or responses to toxic substances. Myocarditis is also a common cause of DILATED CARDIOMYOPATHY and other cardiomyopathies.
Small pumps, often implantable, designed for temporarily assisting the heart, usually the LEFT VENTRICLE, to pump blood. They consist of a pumping chamber and a power source, which may be partially or totally external to the body and activated by electromagnetic motors.
A basic element found in nearly all organized tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.
Method in which prolonged electrocardiographic recordings are made on a portable tape recorder (Holter-type system) or solid-state device ("real-time" system), while the patient undergoes normal daily activities. It is useful in the diagnosis and management of intermittent cardiac arrhythmias and transient myocardial ischemia.
Pathological conditions involving the CARDIOVASCULAR SYSTEM including the HEART; the BLOOD VESSELS; or the PERICARDIUM.
Precursor of epinephrine that is secreted by the adrenal medulla and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers and of the diffuse projection system in the brain arising from the locus ceruleus. It is also found in plants and is used pharmacologically as a sympathomimetic.
A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.
Agents used for the treatment or prevention of cardiac arrhythmias. They may affect the polarization-repolarization phase of the action potential, its excitability or refractoriness, or impulse conduction or membrane responsiveness within cardiac fibers. Anti-arrhythmia agents are often classed into four main groups according to their mechanism of action: sodium channel blockade, beta-adrenergic blockade, repolarization prolongation, or calcium channel blockade.
The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.
Enlargement of the LEFT VENTRICLE of the heart. This increase in ventricular mass is attributed to sustained abnormal pressure or volume loads and is a contributor to cardiovascular morbidity and mortality.
Generally, restoration of blood supply to heart tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. Reperfusion can be induced to treat ischemia. Methods include chemical dissolution of an occluding thrombus, administration of vasodilator drugs, angioplasty, catheterization, and artery bypass graft surgery. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing MYOCARDIAL REPERFUSION INJURY.
Surgical insertion of synthetic material to repair injured or diseased heart valves.
Developmental abnormalities in any portion of the ATRIAL SEPTUM resulting in abnormal communications between the two upper chambers of the heart. Classification of atrial septal defects is based on location of the communication and types of incomplete fusion of atrial septa with the ENDOCARDIAL CUSHIONS in the fetal heart. They include ostium primum, ostium secundum, sinus venosus, and coronary sinus defects.
A condition in which HEART VENTRICLES exhibit impaired function.
The relationship between the dose of an administered drug and the response of the organism to the drug.
Surgery performed on the heart.
Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.
A response by the BARORECEPTORS to increased BLOOD PRESSURE. Increased pressure stretches BLOOD VESSELS which activates the baroreceptors in the vessel walls. The net response of the CENTRAL NERVOUS SYSTEM is a reduction of central sympathetic outflow. This reduces blood pressure both by decreasing peripheral VASCULAR RESISTANCE and by lowering CARDIAC OUTPUT. Because the baroreceptors are tonically active, the baroreflex can compensate rapidly for both increases and decreases in blood pressure.
Any pathological condition where fibrous connective tissue invades any organ, usually as a consequence of inflammation or other injury.
The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells.
The small mass of modified cardiac muscle fibers located at the junction of the superior vena cava (VENA CAVA, SUPERIOR) and right atrium. Contraction impulses probably start in this node, spread over the atrium (HEART ATRIUM) and are then transmitted by the atrioventricular bundle (BUNDLE OF HIS) to the ventricle (HEART VENTRICLE).
Abnormally rapid heartbeat, usually with a HEART RATE above 100 beats per minute for adults. Tachycardia accompanied by disturbance in the cardiac depolarization (cardiac arrhythmia) is called tachyarrhythmia.
One of two major pharmacologically defined classes of adrenergic receptors. The beta adrenergic receptors play an important role in regulating CARDIAC MUSCLE contraction, SMOOTH MUSCLE relaxation, and GLYCOGENOLYSIS.
The 10th cranial nerve. The vagus is a mixed nerve which contains somatic afferents (from skin in back of the ear and the external auditory meatus), visceral afferents (from the pharynx, larynx, thorax, and abdomen), parasympathetic efferents (to the thorax and abdomen), and efferents to striated muscle (of the larynx and pharynx).
Drugs that selectively bind to and activate beta-adrenergic receptors.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.
The chemical reactions involved in the production and utilization of various forms of energy in cells.
Strains of mice in which certain GENES of their GENOMES have been disrupted, or "knocked-out". To produce knockouts, using RECOMBINANT DNA technology, the normal DNA sequence of the gene being studied is altered to prevent synthesis of a normal gene product. Cloned cells in which this DNA alteration is successful are then injected into mouse EMBRYOS to produce chimeric mice. The chimeric mice are then bred to yield a strain in which all the cells of the mouse contain the disrupted gene. Knockout mice are used as EXPERIMENTAL ANIMAL MODELS for diseases (DISEASE MODELS, ANIMAL) and to clarify the functions of the genes.
Statistical models used in survival analysis that assert that the effect of the study factors on the hazard rate in the study population is multiplicative and does not change over time.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Unexpected rapid natural death due to cardiovascular collapse within one hour of initial symptoms. It is usually caused by the worsening of existing heart diseases. The sudden onset of symptoms, such as CHEST PAIN and CARDIAC ARRHYTHMIAS, particularly VENTRICULAR TACHYCARDIA, can lead to the loss of consciousness and cardiac arrest followed by biological death. (from Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 7th ed., 2005)
Drugs used to cause dilation of the blood vessels.
A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external).
A transferase that catalyzes formation of PHOSPHOCREATINE from ATP + CREATINE. The reaction stores ATP energy as phosphocreatine. Three cytoplasmic ISOENZYMES have been identified in human tissues: the MM type from SKELETAL MUSCLE, the MB type from myocardial tissue and the BB type from nervous tissue as well as a mitochondrial isoenzyme. Macro-creatine kinase refers to creatine kinase complexed with other serum proteins.
Calcium-transporting ATPases that catalyze the active transport of CALCIUM into the SARCOPLASMIC RETICULUM vesicles from the CYTOPLASM. They are primarily found in MUSCLE CELLS and play a role in the relaxation of MUSCLES.
A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment.
A widely used non-cardioselective beta-adrenergic antagonist. Propranolol has been used for MYOCARDIAL INFARCTION; ARRHYTHMIA; ANGINA PECTORIS; HYPERTENSION; HYPERTHYROIDISM; MIGRAINE; PHEOCHROMOCYTOMA; and ANXIETY but adverse effects instigate replacement by newer drugs.
A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart.
A selective adrenergic beta-1 blocking agent that is commonly used to treat ANGINA PECTORIS; HYPERTENSION; and CARDIAC ARRHYTHMIAS.
The confinement of a patient in a hospital.
Agents that promote the excretion of urine through their effects on kidney function.
The craniosacral division of the autonomic nervous system. The cell bodies of the parasympathetic preganglionic fibers are in brain stem nuclei and in the sacral spinal cord. They synapse in cranial autonomic ganglia or in terminal ganglia near target organs. The parasympathetic nervous system generally acts to conserve resources and restore homeostasis, often with effects reciprocal to the sympathetic nervous system.
The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.
The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.
The excitable plasma membrane of a muscle cell. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)
Non-human animals, selected because of specific characteristics, for use in experimental research, teaching, or testing.
Abnormal cardiac rhythm that is characterized by rapid, uncoordinated firing of electrical impulses in the upper chambers of the heart (HEART ATRIA). In such case, blood cannot be effectively pumped into the lower chambers of the heart (HEART VENTRICLES). It is caused by abnormal impulse generation.
A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.
The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway.
The study of the heart, its physiology, and its functions.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Transmission of the readings of instruments to a remote location by means of wires, radio waves, or other means. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
An infant during the first month after birth.
The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (= OXYGEN CONSUMPTION) or cell respiration (= CELL RESPIRATION).
Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.
Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.
A potentially lethal cardiac arrhythmia that is characterized by uncoordinated extremely rapid firing of electrical impulses (400-600/min) in HEART VENTRICLES. Such asynchronous ventricular quivering or fibrillation prevents any effective cardiac output and results in unconsciousness (SYNCOPE). It is one of the major electrocardiographic patterns seen with CARDIAC ARREST.
Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios.
Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.
Maleness or femaleness as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or effect of a circumstance. It is used with human or animal concepts but should be differentiated from SEX CHARACTERISTICS, anatomical or physiological manifestations of sex, and from SEX DISTRIBUTION, the number of males and females in given circumstances.
The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.
A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666)
Processes and properties of the CARDIOVASCULAR SYSTEM as a whole or of any of its parts.
Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action during the developmental stages of an organism.
The volume of the HEART, usually relating to the volume of BLOOD contained within it at various periods of the cardiac cycle. The amount of blood ejected from a ventricle at each beat is STROKE VOLUME.
The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN.
Refers to animals in the period of time just after birth.
A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles.
A bluish or purplish discoloration of the skin and mucous membranes due to an increase in the amount of deoxygenated hemoglobin in the blood or a structural defect in the hemoglobin molecule.
An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.
Characteristic restricted to a particular organ of the body, such as a cell type, metabolic response or expression of a particular protein or antigen.
Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding.
Relatively complete absence of oxygen in one or more tissues.
Benzo-indoles similar to CARBOLINES which are pyrido-indoles. In plants, carbazoles are derived from indole and form some of the INDOLE ALKALOIDS.
A network of tubules and sacs in the cytoplasm of SKELETAL MUSCLE FIBERS that assist with muscle contraction and relaxation by releasing and storing calcium ions.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
A condition characterized by the thickening of the ventricular ENDOCARDIUM and subendocardium (MYOCARDIUM), seen mostly in children and young adults in the TROPICAL CLIMATE. The fibrous tissue extends from the apex toward and often involves the HEART VALVES causing restrictive blood flow into the respective ventricles (CARDIOMYOPATHY, RESTRICTIVE).
The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
Drugs used in the treatment of acute or chronic vascular HYPERTENSION regardless of pharmacological mechanism. Among the antihypertensive agents are DIURETICS; (especially DIURETICS, THIAZIDE); ADRENERGIC BETA-ANTAGONISTS; ADRENERGIC ALPHA-ANTAGONISTS; ANGIOTENSIN-CONVERTING ENZYME INHIBITORS; CALCIUM CHANNEL BLOCKERS; GANGLIONIC BLOCKERS; and VASODILATOR AGENTS.
An endogenous substance found mainly in skeletal muscle of vertebrates. It has been tried in the treatment of cardiac disorders and has been added to cardioplegic solutions. (Reynolds JEF(Ed): Martindale: The Extra Pharmacopoeia (electronic version). Micromedex, Inc, Englewood, CO, 1996)
A class of statistical procedures for estimating the survival function (function of time, starting with a population 100% well at a given time and providing the percentage of the population still well at later times). The survival analysis is then used for making inferences about the effects of treatments, prognostic factors, exposures, and other covariates on the function.
The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION.
The proportion of survivors in a group, e.g., of patients, studied and followed over a period, or the proportion of persons in a specified group alive at the beginning of a time interval who survive to the end of the interval. It is often studied using life table methods.
The blood pressure as recorded after wedging a CATHETER in a small PULMONARY ARTERY; believed to reflect the PRESSURE in the pulmonary CAPILLARIES.
The active sympathomimetic hormone from the ADRENAL MEDULLA. It stimulates both the alpha- and beta- adrenergic systems, causes systemic VASOCONSTRICTION and gastrointestinal relaxation, stimulates the HEART, and dilates BRONCHI and cerebral vessels. It is used in ASTHMA and CARDIAC FAILURE and to delay absorption of local ANESTHETICS.
Myosin type II isoforms found in cardiac muscle.
Factors which produce cessation of all vital bodily functions. They can be analyzed from an epidemiologic viewpoint.
The hemodynamic and electrophysiological action of the HEART ATRIA.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
A localized bulging or dilatation in the muscle wall of a heart (MYOCARDIUM), usually in the LEFT VENTRICLE. Blood-filled aneurysms are dangerous because they may burst. Fibrous aneurysms interfere with the heart function through the loss of contractility. True aneurysm is bound by the vessel wall or cardiac wall. False aneurysms are HEMATOMA caused by myocardial rupture.
An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation).
An alkaloid, originally from Atropa belladonna, but found in other plants, mainly SOLANACEAE. Hyoscyamine is the 3(S)-endo isomer of atropine.
Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
The flow of BLOOD through or around an organ or region of the body.
The rate dynamics in chemical or physical systems.
Hypertrophy and dilation of the RIGHT VENTRICLE of the heart that is caused by PULMONARY HYPERTENSION. This condition is often associated with pulmonary parenchymal or vascular diseases, such as CHRONIC OBSTRUCTIVE PULMONARY DISEASE and PULMONARY EMBOLISM.
An electrogenic ion exchange protein that maintains a steady level of calcium by removing an amount of calcium equal to that which enters the cells. It is widely distributed in most excitable membranes, including the brain and heart.
The probability that an event will occur. It encompasses a variety of measures of the probability of a generally unfavorable outcome.
A nucleoside that is composed of ADENINE and D-RIBOSE. Adenosine or adenosine derivatives play many important biological roles in addition to being components of DNA and RNA. Adenosine itself is a neurotransmitter.
Freedom from activity.
Conical muscular projections from the walls of the cardiac ventricles, attached to the cusps of the atrioventricular valves by the chordae tendineae.
The main trunk of the systemic arteries.
Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation.
Identification of proteins or peptides that have been electrophoretically separated by blot transferring from the electrophoresis gel to strips of nitrocellulose paper, followed by labeling with antibody probes.
The larger subunits of MYOSINS. The heavy chains have a molecular weight of about 230 kDa and each heavy chain is usually associated with a dissimilar pair of MYOSIN LIGHT CHAINS. The heavy chains possess actin-binding and ATPase activity.
Disease having a short and relatively severe course.
The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.
Histochemical localization of immunoreactive substances using labeled antibodies as reagents.
Graphic registration of the heart sounds picked up as vibrations and transformed by a piezoelectric crystal microphone into a varying electrical output according to the stresses imposed by the sound waves. The electrical output is amplified by a stethograph amplifier and recorded by a device incorporated into the electrocardiograph or by a multichannel recording machine.
A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
A form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION; (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY).
One of the three polypeptide chains that make up the TROPONIN complex. It inhibits F-actin-myosin interactions.
Receptors in the vascular system, particularly the aorta and carotid sinus, which are sensitive to stretch of the vessel walls.
A disturbance in the prooxidant-antioxidant balance in favor of the former, leading to potential damage. Indicators of oxidative stress include damaged DNA bases, protein oxidation products, and lipid peroxidation products (Sies, Oxidative Stress, 1991, pxv-xvi).
The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.
A general class of ortho-dihydroxyphenylalkylamines derived from tyrosine.
Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.

Extra-vesicular binding of noradrenaline and guanethidine in the adrenergic neurones of the rat heart: a proposed site of action of adrenergic neurone blocking agents. (1/18491)

1 The binding and efflux characteristics of [14C]-guanethidine and [3H]-noradrenaline were studied in heart slices from rats which were pretreated with reserpine and nialamide. 2 Binding of both compounds occurred at extra-vesicular sites within the adrenergic neurone. After a brief period of rapid washout, the efflux of [14C]-guanethidine and [3H]-noradrenaline proceeded at a steady rate. The efflux of both compounds appeared to occur from a single intraneuronal compartment. 3 (+)-Amphetamine accelerated the efflux of [14C]-noradrenaline; this effect was inhibited by desipramine. 4 Unlabelled guanethidine and amantadine also increased the efflux of labelled compounds. Cocaine in high concentrations increased slightly the efflux of [14C]-guanethidine but not that of [3H]-noradrenaline. 5 Heart slices labelled with [3H]-noradrenaline became refractory to successive exposures to releasing agents although an appreciable amount of labelled compound was still present in in these slices. 6 It is suggested that [14C]-guanethidine and [3H]-noradrenaline are bound at a common extravesicular site within the adrenergic neurone. Binding of guanethidine to the extra-vesicular site may be relevant to its pharmacological action, i.e., the blockade of adrenergic transmission.  (+info)

Myocardial uptake of digoxin in chronically digitalized dogs. (2/18491)

1 The time course of myocardial uptake of digoxin, increase in contractility and changes in myocardial potassium concentration was studied for 90 min following an intravenous digoxin dose to long-term digitalized dogs. 2 Nineteen dogs were investigated by the use of a biopsy technique which allowed sampling before and after administration of digoxin. 3 Ten minutes after administration of digoxin the myocardial concentration increased from 60 to 306 nmol/kg tissue, the myocardial concentration of digoxin was significantly lower (250 nmol/kg tissue) after 30 min and then increased again. 4 The transmural myocardial distribution of digoxin was uniform before and 90 min after administration of digoxin in long-term digitalized dogs but at 10 min after administration, both the subepicardial and the subendocardial concentration of digoxin were significantly lower than that of the mesocardial layer. 5 During the first 10 min the dp/dtmax increased to 135% of the control level. The increase remained unchanged during the rest of the study. 6 Myocardial potassium decreased throughout the study. 7 The M-configuration of the myocardial uptake curve and the non-uniformity of myocardial distribution of digoxin observed at 10 min after administrating digoxin to long-term digitalized dogs indicate that the distribution of myocardial blood flow may be changed during chronic digitalization.  (+info)

A comparison of affinity constants for muscarine-sensitive acetylcholine receptors in guinea-pig atrial pacemaker cells at 29 degrees C and in ileum at 29 degrees C and 37 degrees C. (3/18491)

1 The affinity of 17 compounds for muscarine-sensitive acetylcholine receptors in atrial pacemaker cells and ileum of the guinea-pig has been measured at 29 degrees C in Ringer-Locke solution. Measurements were also made at 37 degrees C with 7 of them. 2 Some of the compounds had much higher affinity for the receptors in the ileum than for those in the atria. For the most selective compound, 4-diphenylacetoxy-N-methylpiperidine methiodide, the difference was approximately 20-fold. The receptors in the atria are therefore different the structure from those in the ileum. 3 The effect of temperature on affinity are not the same for all the compounds, tested indicating different enthalpies and entropies of adsorption and accounting for some of the difficulty experienced in predicting the affinity of new compounds.  (+info)

Automatic activity in depolarized guinea pig ventricular myocardium. Characteristics and mechanisms. (4/18491)

Membrane potential was changed uniformly in segments, 0.7-1.0 mm long, of guinea pig papillary muscles excised from the right ventricle by using extracellular polarizing current pulses applied across two electrically insulated cf preparations superfused with Tyrode's solution at maximum diastolic membrane potentials ranging from-35.2+/-7.5 (threshold) to +4.0+/-9.2 mV. The average maximum dV/dt of RAD ranged from 17.1 to 18.0 V/sec within a membrane potential range of -40 to +20 mV. Raising extracellular Ca2+ concentration [Ca2+]0 from 1.8 to 6.8 mM, or application of isoproterenol (10(-6)g/ml) enhanced the rate of RAD, but lowering [Ca2+]0 to 0.4 mM or exposure to MnCl2 (6 mM) abolished RAD. RAD were enhanced by lowering extracellular K+ concentration [K+]0 from 5.4 to 1.5 mM. RAD were suppressed in 40% of fibers by raising [K+]0 to 15.4 mM, and in all fibers by raising [K+]0 to 40.4 mM. This suppression was due to increased [K+]0 and not to K-induced depolarization because it persisted when membrane potential was held by means of a conditioning hyperpolarizing puled gradually after maximum repolarization. These observations suggest that the development of RAD in depolarized myocardium is associated with a time-dependent decrease in outward current (probably K current) and with increase in the background inward current, presumably flowing through the slow cha-nel carrying Ca or Na ions, or both.  (+info)

Phasic right coronary artery blood flow in conscious dogs with normal and elevated right ventricular pressures. (5/18491)

We studied phasic right coronary blood flow in well trained normal dogs and dogs with pulmonic stenosis. We installed electromagnetic flow transducers and pressure tubes under anesthesia to monitor right coronary blood flow, cardiac output, central aortic blood pressure, and right ventribular pressure. In normotensive dogs, systolic flow amplitude equaled early diastolic flow levels. The ratio of systolic to diastolic flow at rest was substantially greater in the right coronary bed (36+/-1.3%) than in the left circumflex bed (13+/-3.6%). Right diastolid flow runoff, including the cove late in diastole, resembled left circumflex runoff. Blood flow to the normotensive right (37+/-1.1 ml/min 100(-1) g) and the left (35+/-1.0 ml/min(-1) g) ventricular myocardium indicated equal perfusion of both cardiac walls. Throttling of systolic flow was related directly to the right ventricular systolic pressure level in the dogs with pulmonic stenosis. Retrograde systolic flow occurred in severe right ventricular hypertension. The late diastolic runoff pattern in dogs with pulmonic stenosis appeared the same as for the normotensive dogs. We obtained systolic to diastolic flow ratios of 1/3 the value of normotensive hearts in high and severe pulmonic hypertension. Electrocardiograms and studies of pathology suggested restricted blood flow to the inner layers of the right myocardium in the dogs with severe and high right ventricular hypertension. Normotensive and hypertensive peak hyperemic flow responses were similar, except for an increased magnitude of diastolic flow, with proportionately less systolic flow in hypertensive states.  (+info)

Ventricular pressure-volume curve indices change with end-diastolic pressure. (6/18491)

Many indices have been proposed to describee the diastolic pressure-volume curve mathematically and permit quantification of the elastic properties of the myocardium itself in hopes that changes in the muscle caused by disease would b.e reflected in the diastolic pressure-volume curve. To date, none of the proposed indices has been shown convincingly to discriminate one group of patients from another. While this situation in part arises from the relatively large amount of noise introduced by the technical difficulties of measuring synchronous pressures and volumes during diastole in man, ther is a more fundamental difficulty. In practice, one can measure only a short segment of the entire pressure-volume curve, and the values of all diastolic pressure-volume curve parameters investigated change significantly when one uses different segments of the same pressure-volume curve to compute them. These results were derived from relatively noise-free pressure-volume curves obtained by filling nine excised dog left ventricles at a known rate and monitoring pressure-volume curve used to compute the parameter. Merely increasing measurement fidelity will not resolve this problem, because none of these parameters accurately characterizes the entire diastolic pressure-volume curbe from a segment like that which one can reasonably expect to obtain from humans.  (+info)

Hierarchy of ventricular pacemakers. (7/18491)

To characterize the pattern of pacemaker dominance in the ventricular specialized conduction system (VSCS), escape ventricular pacemakers were localized and quantified in vivo and in virto, in normal hearts and in hearts 24 hours after myocardial infarction. Excape pacemaker foci were localized in vivo during vagally induced atrial arrest by means of electrograms recorded from the His bundle and proximal bundle branches and standard electrocardiographic limb leads. The VSCS was isolated using a modified Elizari preparation or preparations of each bundle branch. Peacemakers were located by extra- and intracellular recordings. Escape pacemaker foci in vivo were always in the proximal conduction system, usually the left bundle branch. The rate was 43+/-11 (mean+/-SD) beats/min. After beta-adrenergic blockade, the mean rate fell to 31+/-10 beats/min, but there were no shifts in pacemaker location. In the infarcted hearts, pacemakers were located in the peripheral left bundle branch. The mean rate was 146+/-20 beats/min. In isolated normal preparations, the dominant pacemakers usually were in the His bundle, firing at a mean rate of 43+/-10 beats/min. The rates of pacemakers diminished with distal progression. In infarcted hearts, the pacemakers invariably were in the infarct zone. The mean firing rates were not influenced by beta-adrenergic blockade. The results indicate that the dominant pacemakers are normally in the very proximal VSCS, but after myocardial infarction pacemaker dominance is shifted into the infarct. Distribution of pacemaker dominance is independent of sympathetic influence.  (+info)

The homeobox gene Pitx2: mediator of asymmetric left-right signaling in vertebrate heart and gut looping. (8/18491)

Left-right asymmetry in vertebrates is controlled by activities emanating from the left lateral plate. How these signals get transmitted to the forming organs is not known. A candidate mediator in mouse, frog and zebrafish embryos is the homeobox gene Pitx2. It is asymmetrically expressed in the left lateral plate mesoderm, tubular heart and early gut tube. Localized Pitx2 expression continues when these organs undergo asymmetric looping morphogenesis. Ectopic expression of Xnr1 in the right lateral plate induces Pitx2 transcription in Xenopus. Misexpression of Pitx2 affects situs and morphology of organs. These experiments suggest a role for Pitx2 in promoting looping of the linear heart and gut.  (+info)

There are two main types of heart failure:

1. Left-sided heart failure: This occurs when the left ventricle, which is the main pumping chamber of the heart, becomes weakened and is unable to pump blood effectively. This can lead to congestion in the lungs and other organs.
2. Right-sided heart failure: This occurs when the right ventricle, which pumps blood to the lungs, becomes weakened and is unable to pump blood effectively. This can lead to congestion in the body's tissues and organs.

Symptoms of heart failure may include:

* Shortness of breath
* Fatigue
* Swelling in the legs, ankles, and feet
* Swelling in the abdomen
* Weight gain
* Coughing up pink, frothy fluid
* Rapid or irregular heartbeat
* Dizziness or lightheadedness

Treatment for heart failure typically involves a combination of medications and lifestyle changes. Medications may include diuretics to remove excess fluid from the body, ACE inhibitors or beta blockers to reduce blood pressure and improve blood flow, and aldosterone antagonists to reduce the amount of fluid in the body. Lifestyle changes may include a healthy diet, regular exercise, and stress reduction techniques. In severe cases, heart failure may require hospitalization or implantation of a device such as an implantable cardioverter-defibrillator (ICD) or a left ventricular assist device (LVAD).

It is important to note that heart failure is a chronic condition, and it requires ongoing management and monitoring to prevent complications and improve quality of life. With proper treatment and lifestyle changes, many people with heart failure are able to manage their symptoms and lead active lives.

There are many different types of heart diseases, including:

1. Coronary artery disease: The buildup of plaque in the coronary arteries, which supply blood to the heart muscle, leading to chest pain or a heart attack.
2. Heart failure: When the heart is unable to pump enough blood to meet the body's needs, leading to fatigue, shortness of breath, and swelling in the legs.
3. Arrhythmias: Abnormal heart rhythms, such as atrial fibrillation or ventricular tachycardia, which can cause palpitations, dizziness, and shortness of breath.
4. Heart valve disease: Problems with the heart valves, which can lead to blood leaking back into the chambers or not being pumped effectively.
5. Cardiomyopathy: Disease of the heart muscle, which can lead to weakened heart function and heart failure.
6. Heart murmurs: Abnormal sounds heard during a heartbeat, which can be caused by defects in the heart valves or abnormal blood flow.
7. Congenital heart disease: Heart defects present at birth, such as holes in the heart or abnormal blood vessels.
8. Myocardial infarction (heart attack): Damage to the heart muscle due to a lack of oxygen, often caused by a blockage in a coronary artery.
9. Cardiac tamponade: Fluid accumulation around the heart, which can cause compression of the heart and lead to cardiac arrest.
10. Endocarditis: Infection of the inner lining of the heart, which can cause fever, fatigue, and heart valve damage.

Heart diseases can be diagnosed through various tests such as electrocardiogram (ECG), echocardiogram, stress test, and blood tests. Treatment options depend on the specific condition and may include lifestyle changes, medication, surgery, or a combination of these.

Types of congenital heart defects include:

1. Ventricular septal defect (VSD): A hole in the wall between the two lower chambers of the heart, allowing abnormal blood flow.
2. Atrial septal defect (ASD): A hole in the wall between the two upper chambers of the heart, also allowing abnormal blood flow.
3. Tetralogy of Fallot: A combination of four heart defects, including VSD, pulmonary stenosis (narrowing of the pulmonary valve), and abnormal development of the infundibulum (a part of the heart that connects the ventricles to the pulmonary artery).
4. Transposition of the great vessels: A condition in which the aorta and/or pulmonary artery are placed in the wrong position, disrupting blood flow.
5. Hypoplastic left heart syndrome (HLHS): A severe defect in which the left side of the heart is underdeveloped, resulting in insufficient blood flow to the body.
6. Pulmonary atresia: A condition in which the pulmonary valve does not form properly, blocking blood flow to the lungs.
7. Truncus arteriosus: A rare defect in which a single artery instead of two (aorta and pulmonary artery) arises from the heart.
8. Double-outlet right ventricle: A condition in which both the aorta and the pulmonary artery arise from the right ventricle instead of the left ventricle.

Causes of congenital heart defects are not fully understood, but genetics, environmental factors, and viral infections during pregnancy may play a role. Diagnosis is typically made through fetal echocardiography or cardiac ultrasound during pregnancy or after birth. Treatment depends on the type and severity of the defect and may include medication, surgery, or heart transplantation. With advances in medical technology and treatment, many children with congenital heart disease can lead active, healthy lives into adulthood.


There are several types of heart block, including:

1. First-degree heart block: This is the mildest form of heart block, where the electrical signals are delayed slightly but still reach the ventricles.
2. Second-degree heart block: In this type, some of the electrical signals may be blocked or delayed, causing the heart to beat irregularly.
3. Third-degree heart block: This is the most severe form of heart block, where all electrical signals are completely blocked, resulting in a complete halt of the heart's normal rhythm.

Heart block can be caused by a variety of factors, including:

1. Coronary artery disease: A buildup of plaque in the coronary arteries can lead to a blockage that affects the electrical signals to the heart.
2. Heart attack: Damage to the heart muscle can cause scarring and disrupt the electrical signals.
3. Cardiomyopathy: Disease of the heart muscle can lead to heart block.
4. Heart valve problems: Dysfunctional heart valves can interfere with the electrical signals to the heart.
5. Electrolyte imbalances: Abnormal levels of potassium, magnesium, or other electrolytes can affect the heart's electrical activity.
6. Medications: Certain drugs, such as beta-blockers and calcium channel blockers, can slow down the heart's electrical signals.
7. Infections: Viral or bacterial infections can damage the heart and disrupt its electrical signals.
8. Genetic conditions: Certain inherited conditions, such as long QT syndrome, can affect the heart's electrical activity.
9. Autoimmune disorders: Conditions such as rheumatoid arthritis or lupus can damage the heart and disrupt its electrical signals.

Symptoms of heart block may include:

1. Slow or irregular heartbeat
2. Palpitations
3. Fatigue
4. Shortness of breath
5. Dizziness or lightheadedness
6. Chest pain or discomfort
7. Pain or discomfort in the arms, back, or jaw

Diagnosis of heart block is typically made with an electrocardiogram (ECG), which measures the electrical activity of the heart. Other tests that may be used to diagnose heart block include:

1. Echocardiography: An ultrasound test that uses sound waves to create images of the heart.
2. Stress test: A test that measures the heart's activity during exercise or other forms of physical stress.
3. Holter monitor: A portable device that records the heart's activity over a 24-hour period.
4. Event monitor: A portable device that records the heart's activity over a longer period of time, typically 1-2 weeks.

Treatment for heart block depends on the severity of the condition and may include:

1. Medications: Drugs such as beta blockers or pacemakers may be used to regulate the heart's rhythm and rate.
2. Pacemaker: A small device that is implanted in the chest to help regulate the heart's rhythm.
3. Cardiac resynchronization therapy (CRT): A procedure that involves implanting a device that helps both ventricles of the heart beat together, improving the heart's pumping function.
4. Implantable cardioverter-defibrillator (ICD): A device that is implanted in the chest to monitor the heart's rhythm and deliver an electric shock if it detects a potentially life-threatening arrhythmia.

In conclusion, heart block is a serious condition that can disrupt the normal functioning of the heart. It is important to be aware of the risk factors and symptoms of heart block, and to seek medical attention immediately if they occur. With proper diagnosis and treatment, it is possible to manage heart block and improve the quality of life for those affected by the condition.

Myocardial ischemia can be caused by a variety of factors, including coronary artery disease, high blood pressure, diabetes, and smoking. It can also be triggered by physical exertion or stress.

There are several types of myocardial ischemia, including:

1. Stable angina: This is the most common type of myocardial ischemia, and it is characterized by a predictable pattern of chest pain that occurs during physical activity or emotional stress.
2. Unstable angina: This is a more severe type of myocardial ischemia that can occur without any identifiable trigger, and can be accompanied by other symptoms such as shortness of breath or vomiting.
3. Acute coronary syndrome (ACS): This is a condition that includes both stable angina and unstable angina, and it is characterized by a sudden reduction in blood flow to the heart muscle.
4. Heart attack (myocardial infarction): This is a type of myocardial ischemia that occurs when the blood flow to the heart muscle is completely blocked, resulting in damage or death of the cardiac tissue.

Myocardial ischemia can be diagnosed through a variety of tests, including electrocardiograms (ECGs), stress tests, and imaging studies such as echocardiography or cardiac magnetic resonance imaging (MRI). Treatment options for myocardial ischemia include medications such as nitrates, beta blockers, and calcium channel blockers, as well as lifestyle changes such as quitting smoking, losing weight, and exercising regularly. In severe cases, surgical procedures such as coronary artery bypass grafting or angioplasty may be necessary.

Coronary disease is often caused by a combination of genetic and lifestyle factors, such as high blood pressure, high cholesterol levels, smoking, obesity, and a lack of physical activity. It can also be triggered by other medical conditions, such as diabetes and kidney disease.

The symptoms of coronary disease can vary depending on the severity of the condition, but may include:

* Chest pain or discomfort (angina)
* Shortness of breath
* Fatigue
* Swelling of the legs and feet
* Pain in the arms and back

Coronary disease is typically diagnosed through a combination of physical examination, medical history, and diagnostic tests such as electrocardiograms (ECGs), stress tests, and cardiac imaging. Treatment for coronary disease may include lifestyle changes, medications to control symptoms, and surgical procedures such as angioplasty or bypass surgery to improve blood flow to the heart.

Preventative measures for coronary disease include:

* Maintaining a healthy diet and exercise routine
* Quitting smoking and limiting alcohol consumption
* Managing high blood pressure, high cholesterol levels, and other underlying medical conditions
* Reducing stress through relaxation techniques or therapy.

Measurement:

Cardiac output is typically measured using invasive or non-invasive methods. Invasive methods involve inserting a catheter into the heart to directly measure cardiac output. Non-invasive methods include echocardiography, MRI, and CT scans. These tests can provide an estimate of cardiac output based on the volume of blood being pumped out of the heart and the rate at which it is being pumped.

Causes:

There are several factors that can contribute to low cardiac output. These include:

1. Heart failure: This occurs when the heart is unable to pump enough blood to meet the body's needs, leading to fatigue and shortness of breath.
2. Anemia: A low red blood cell count can reduce the amount of oxygen being delivered to the body's tissues, leading to fatigue and weakness.
3. Medication side effects: Certain medications, such as beta blockers, can slow down the heart rate and reduce cardiac output.
4. Sepsis: A severe infection can lead to inflammation throughout the body, which can affect the heart's ability to pump blood effectively.
5. Myocardial infarction (heart attack): This occurs when the heart muscle is damaged due to a lack of oxygen, leading to reduced cardiac output.

Symptoms:

Low cardiac output can cause a range of symptoms, including:

1. Fatigue and weakness
2. Dizziness and lightheadedness
3. Shortness of breath
4. Pale skin
5. Decreased urine output
6. Confusion and disorientation

Treatment:

The treatment of low cardiac output depends on the underlying cause. Treatment may include:

1. Medications to increase heart rate and contractility
2. Diuretics to reduce fluid buildup in the body
3. Oxygen therapy to increase oxygenation of tissues
4. Mechanical support devices, such as intra-aortic balloon pumps or ventricular assist devices
5. Surgery to repair or replace damaged heart tissue
6. Lifestyle changes, such as a healthy diet and regular exercise, to improve cardiovascular health.

Prevention:

Preventing low cardiac output involves managing any underlying medical conditions, taking medications as directed, and making lifestyle changes to improve cardiovascular health. This may include:

1. Monitoring and controlling blood pressure
2. Managing diabetes and other chronic conditions
3. Avoiding substances that can damage the heart, such as tobacco and excessive alcohol
4. Exercising regularly
5. Eating a healthy diet that is low in saturated fats and cholesterol
6. Maintaining a healthy weight.

The primary cause of systolic heart failure is typically related to damage or disease affecting the left ventricle, such as coronary artery disease, hypertension, or cardiomyopathy. Other contributing factors may include valvular heart disease, anemia, and thyroid disorders.

Diagnosis of systolic heart failure often involves a physical examination, medical history, and diagnostic tests such as electrocardiography (ECG), echocardiography, and blood tests. Treatment options for systolic heart failure may include lifestyle modifications, medications to manage symptoms and slow progression of the disease, and in severe cases, implantable devices or surgical interventions such as left ventricular assist devices (LVADs) or heart transplantation.

Systolic heart failure is a serious medical condition that can significantly impact quality of life and longevity if left untreated or undertreated. Therefore, early diagnosis and aggressive management are essential to improve outcomes for patients with this condition.

There are several possible causes of dilated cardiomyopathy, including:

1. Coronary artery disease: This is the most common cause of dilated cardiomyopathy, and it occurs when the coronary arteries become narrowed or blocked, leading to a decrease in blood flow to the heart muscle.
2. High blood pressure: Prolonged high blood pressure can cause the heart muscle to become weakened and enlarged.
3. Heart valve disease: Dysfunctional heart valves can lead to an increased workload on the heart, which can cause dilated cardiomyopathy.
4. Congenital heart defects: Some congenital heart defects can lead to an enlarged heart and dilated cardiomyopathy.
5. Alcohol abuse: Chronic alcohol abuse can damage the heart muscle and lead to dilated cardiomyopathy.
6. Viral infections: Some viral infections, such as myocarditis, can cause inflammation of the heart muscle and lead to dilated cardiomyopathy.
7. Genetic disorders: Certain genetic disorders, such as hypertrophic cardiomyopathy, can cause dilated cardiomyopathy.
8. Obesity: Obesity is a risk factor for developing dilated cardiomyopathy, particularly in younger people.
9. Diabetes: Diabetes can increase the risk of developing dilated cardiomyopathy, especially if left untreated or poorly controlled.
10. Age: Dilated cardiomyopathy is more common in older adults, with the majority of cases occurring in people over the age of 65.

It's important to note that many people with these risk factors will not develop dilated cardiomyopathy, and some people without any known risk factors can still develop the condition. If you suspect you or someone you know may have dilated cardiomyopathy, it's important to consult a healthcare professional for proper diagnosis and treatment.

Medical Term: Cardiomegaly

Definition: An abnormal enlargement of the heart.

Symptoms: Difficulty breathing, shortness of breath, fatigue, swelling of legs and feet, chest pain, and palpitations.

Causes: Hypertension, cardiac valve disease, myocardial infarction (heart attack), congenital heart defects, and other conditions that affect the heart muscle or cardiovascular system.

Diagnosis: Physical examination, electrocardiogram (ECG), chest x-ray, echocardiography, and other diagnostic tests as necessary.

Treatment: Medications such as diuretics, vasodilators, and beta blockers, lifestyle changes such as exercise and diet modifications, surgery or other interventions in severe cases.

Note: Cardiomegaly is a serious medical condition that requires prompt diagnosis and treatment to prevent complications such as heart failure and death. If you suspect you or someone else may have cardiomegaly, seek medical attention immediately.

There are different types of myocardial infarctions, including:

1. ST-segment elevation myocardial infarction (STEMI): This is the most severe type of heart attack, where a large area of the heart muscle is damaged. It is characterized by a specific pattern on an electrocardiogram (ECG) called the ST segment.
2. Non-ST-segment elevation myocardial infarction (NSTEMI): This type of heart attack is less severe than STEMI, and the damage to the heart muscle may not be as extensive. It is characterized by a smaller area of damage or a different pattern on an ECG.
3. Incomplete myocardial infarction: This type of heart attack is when there is some damage to the heart muscle but not a complete blockage of blood flow.
4. Collateral circulation myocardial infarction: This type of heart attack occurs when there are existing collateral vessels that bypass the blocked coronary artery, which reduces the amount of damage to the heart muscle.

Symptoms of a myocardial infarction can include chest pain or discomfort, shortness of breath, lightheadedness, and fatigue. These symptoms may be accompanied by anxiety, fear, and a sense of impending doom. In some cases, there may be no noticeable symptoms at all.

Diagnosis of myocardial infarction is typically made based on a combination of physical examination findings, medical history, and diagnostic tests such as an electrocardiogram (ECG), cardiac enzyme tests, and imaging studies like echocardiography or cardiac magnetic resonance imaging.

Treatment of myocardial infarction usually involves medications to relieve pain, reduce the amount of work the heart has to do, and prevent further damage to the heart muscle. These may include aspirin, beta blockers, ACE inhibitors or angiotensin receptor blockers, and statins. In some cases, a procedure such as angioplasty or coronary artery bypass surgery may be necessary to restore blood flow to the affected area.

Prevention of myocardial infarction involves managing risk factors such as high blood pressure, high cholesterol, smoking, diabetes, and obesity. This can include lifestyle changes such as a healthy diet, regular exercise, and stress reduction, as well as medications to control these conditions. Early detection and treatment of heart disease can help prevent myocardial infarction from occurring in the first place.

There are several types of heart injuries that can occur, including:

1. Myocardial infarction (heart attack): This occurs when the blood flow to the heart is blocked, causing damage to the heart muscle.
2. Cardiac tamponade: This occurs when fluid accumulates in the space between the heart and the sac that surrounds it, putting pressure on the heart and impeding its ability to function properly.
3. Myocarditis: This is an inflammation of the heart muscle that can be caused by a virus or bacteria.
4. Pericardial tamponade: This occurs when fluid accumulates in the space between the heart and the sac that surrounds it, putting pressure on the heart and impeding its ability to function properly.
5. Heart failure: This occurs when the heart is unable to pump enough blood to meet the body's needs.
6. Coronary artery disease: This occurs when the coronary arteries, which supply blood to the heart, become narrowed or blocked, leading to damage to the heart muscle.
7. Cardiac rupture: This is a rare and severe injury that occurs when the heart muscle tears or ruptures.

Symptoms of heart injuries can include chest pain, shortness of breath, fatigue, and irregular heartbeat. Treatment options for heart injuries depend on the severity of the injury and can range from medications to surgery. In some cases, heart injuries may be fatal if not properly treated.

In conclusion, heart injuries are a serious medical condition that can have long-term consequences if not properly treated. It is important to seek medical attention immediately if symptoms of a heart injury are present.

Treatment for rheumatic heart disease typically involves antibiotics to prevent further damage and medications to manage symptoms such as high blood pressure, swelling, and shortness of breath. In severe cases, surgery may be necessary to repair or replace damaged valves.

Prevention of rheumatic heart disease involves early diagnosis and treatment of rheumatic fever, as well as maintaining good cardiovascular health through a healthy diet, regular exercise, and not smoking.

Some common symptoms of rheumatic heart disease include:

* Shortness of breath
* Fatigue
* Swelling in the legs, ankles, and feet
* Chest pain or discomfort
* Dizziness or lightheadedness
* Irregular heartbeat

Some common risk factors for developing rheumatic heart disease include:

* Previous exposure to group A streptococcus bacteria, which can cause rheumatic fever
* Family history of rheumatic heart disease
* Poor living conditions or overcrowding, which can increase the risk of exposure to group A streptococcus bacteria
* Malnutrition or a diet low in certain nutrients, such as vitamin D and iron.

There are several types of cardiomyopathies, each with distinct characteristics and symptoms. Some of the most common forms of cardiomyopathy include:

1. Hypertrophic cardiomyopathy (HCM): This is the most common form of cardiomyopathy and is characterized by an abnormal thickening of the heart muscle, particularly in the left ventricle. HCM can lead to obstruction of the left ventricular outflow tract and can increase the risk of sudden death.
2. Dilated cardiomyopathy: This type of cardiomyopathy is characterized by a decrease in the heart's ability to pump blood effectively, leading to enlargement of the heart and potentially life-threatening complications such as congestive heart failure.
3. Restrictive cardiomyopathy: This type of cardiomyopathy is characterized by stiffness of the heart muscle, which makes it difficult for the heart to fill with blood. This can lead to shortness of breath and fatigue.
4. Left ventricular non-compaction (LVNC): This is a rare type of cardiomyopathy that occurs when the left ventricle does not properly compact, leading to reduced cardiac function and potentially life-threatening complications.
5. Cardiac amyloidosis: This is a condition in which abnormal proteins accumulate in the heart tissue, leading to stiffness and impaired cardiac function.
6. Right ventricular cardiomyopathy (RVCM): This type of cardiomyopathy is characterized by impaired function of the right ventricle, which can lead to complications such as pulmonary hypertension and heart failure.
7. Endocardial fibroelastoma: This is a rare type of cardiomyopathy that occurs when abnormal tissue grows on the inner lining of the heart, leading to reduced cardiac function and potentially life-threatening complications.
8. Cardiac sarcoidosis: This is a condition in which inflammatory cells accumulate in the heart, leading to impaired cardiac function and potentially life-threatening complications.
9. Hypertrophic cardiomyopathy (HCM): This is a condition in which the heart muscle thickens, leading to reduced cardiac function and potentially life-threatening complications such as arrhythmias and sudden death.
10. Hypokinetic left ventricular cardiomyopathy: This type of cardiomyopathy is characterized by decreased contraction of the left ventricle, leading to reduced cardiac function and potentially life-threatening complications such as heart failure.

It's important to note that some of these types of cardiomyopathy are more common in certain populations, such as hypertrophic cardiomyopathy being more common in young athletes. Additionally, some types of cardiomyopathy may have overlapping symptoms or co-occurring conditions, so it's important to work with a healthcare provider for an accurate diagnosis and appropriate treatment.

MRI can occur in various cardiovascular conditions, such as myocardial infarction (heart attack), cardiac arrest, and cardiac surgery. The severity of MRI can range from mild to severe, depending on the extent and duration of the ischemic event.

The pathophysiology of MRI involves a complex interplay of various cellular and molecular mechanisms. During ischemia, the heart muscle cells undergo changes in energy metabolism, electrolyte balance, and cell membrane function. When blood flow is restored, these changes can lead to an influx of calcium ions into the cells, activation of enzymes, and production of reactive oxygen species (ROS), which can damage the cells and their membranes.

The clinical presentation of MRI can vary depending on the severity of the injury. Some patients may experience chest pain, shortness of breath, and fatigue. Others may have more severe symptoms, such as cardiogenic shock or ventricular arrhythmias. The diagnosis of MRI is based on a combination of clinical findings, electrocardiography (ECG), echocardiography, and cardiac biomarkers.

The treatment of MRI is focused on addressing the underlying cause of the injury and managing its symptoms. For example, in patients with myocardial infarction, thrombolysis or percutaneous coronary intervention may be used to restore blood flow to the affected area. In patients with cardiac arrest, cardiopulmonary resuscitation (CPR) and other life-saving interventions may be necessary.

Prevention of MRI is crucial in reducing its incidence and severity. This involves aggressive risk factor management, such as controlling hypertension, diabetes, and dyslipidemia, as well as smoking cessation and stress reduction. Additionally, patients with a history of MI should adhere to their medication regimen, which may include beta blockers, ACE inhibitors or ARBs, statins, and aspirin.

In conclusion, myocardial injury with ST-segment elevation (MRI) is a life-threatening condition that requires prompt recognition and treatment. While the clinical presentation can vary depending on the severity of the injury, early diagnosis and management are crucial in reducing morbidity and mortality. Prevention through aggressive risk factor management and adherence to medication regimens is also essential in preventing MRI.

There are two types of heart arrest:

1. Asystole - This is when the heart stops functioning completely and there is no electrical activity in the heart.
2. Pulseless ventricular tachycardia or fibrillation - This is when the heart is still functioning but there is no pulse and the rhythm is abnormal.

Heart arrest can be diagnosed through various tests such as electrocardiogram (ECG), blood tests, and echocardiography. Treatment options for heart arrest include cardiopulmonary resuscitation (CPR), defibrillation, and medications to restore a normal heart rhythm.

In severe cases of heart arrest, the patient may require advanced life support measures such as mechanical ventilation and cardiac support devices. The prognosis for heart arrest is generally poor, especially if it is not treated promptly and effectively. However, with proper treatment and support, some patients can recover and regain normal heart function.

There are several potential causes of LVD, including:

1. Coronary artery disease: The buildup of plaque in the coronary arteries can lead to a heart attack, which can damage the left ventricle and impair its ability to function properly.
2. Heart failure: When the heart is unable to pump enough blood to meet the body's needs, it can lead to LVD.
3. Cardiomyopathy: This is a condition where the heart muscle becomes weakened or enlarged, leading to impaired function of the left ventricle.
4. Heart valve disease: Problems with the heart valves can disrupt the normal flow of blood and cause LVD.
5. Hypertension: High blood pressure can cause damage to the heart muscle and lead to LVD.
6. Genetic factors: Some people may be born with genetic mutations that predispose them to developing LVD.
7. Viral infections: Certain viral infections, such as myocarditis, can inflame and damage the heart muscle, leading to LVD.
8. Alcohol or drug abuse: Substance abuse can damage the heart muscle and lead to LVD.
9. Nutritional deficiencies: A diet lacking essential nutrients can lead to damage to the heart muscle and increase the risk of LVD.

Diagnosis of LVD typically involves a physical exam, medical history, and results of diagnostic tests such as electrocardiograms (ECGs), echocardiograms, and stress tests. Treatment options for LVD depend on the underlying cause, but may include medications to improve cardiac function, lifestyle changes, and in severe cases, surgery or other procedures.

Preventing LVD involves taking steps to maintain a healthy heart and reducing risk factors such as high blood pressure, smoking, and obesity. This can be achieved through a balanced diet, regular exercise, stress management, and avoiding substance abuse. Early detection and treatment of underlying conditions that increase the risk of LVD can also help prevent the condition from developing.

A type of heart failure that occurs when the heart muscle is weakened and cannot properly relax between beats, leading to a decrease in blood flow and an increase in pressure in the veins. In diastolic heart failure, the heart's ability to fill with blood during the relaxation phase (diastole) is impaired, but the heart's contraction strength remains relatively normal.

Symptoms of diastolic heart failure may include fatigue, shortness of breath, swelling in the legs and feet, and difficulty exercising. Diagnosis typically involves a physical examination, medical history, and results from tests such as an electrocardiogram (ECG), echocardiography, or blood tests.

Treatment for diastolic heart failure often includes lifestyle modifications, such as a low-sodium diet, regular exercise, and weight loss, as well as medications to manage symptoms and slow the progression of the disease. In severe cases, implantable devices such as pacemakers or cardioverter-defibrillators may be recommended.

Prognosis for diastolic heart failure is generally better than for systolic heart failure, as the heart's contraction strength remains relatively normal. However, if left untreated, diastolic heart failure can lead to complications such as heart valve problems, atrial fibrillation, and congestive heart failure.

During ventricular remodeling, the heart muscle becomes thicker and less flexible, leading to a decrease in the heart's ability to fill with blood and pump it out to the body. This can lead to shortness of breath, fatigue, and swelling in the legs and feet.

Ventricular remodeling is a natural response to injury, but it can also be exacerbated by factors such as high blood pressure, diabetes, and obesity. Treatment for ventricular remodeling typically involves medications and lifestyle changes, such as exercise and a healthy diet, to help manage symptoms and slow the progression of the condition. In some cases, surgery or other procedures may be necessary to repair or replace damaged heart tissue.

The process of ventricular remodeling is complex and involves multiple cellular and molecular mechanisms. It is thought to be driven by a variety of factors, including changes in gene expression, inflammation, and the activity of various signaling pathways.

Overall, ventricular remodeling is an important condition that can have significant consequences for patients with heart disease. Understanding its causes and mechanisms is crucial for developing effective treatments and improving outcomes for those affected by this condition.

There are several types of heart septal defects, including:

1. Atrial septal defect (ASD): A hole in the wall between the two upper chambers (atria) of the heart.
2. Ventricular septal defect (VSD): A hole in the wall between the two lower chambers (ventricles) of the heart.
3. Patent ductus arteriosus (PDA): A connection between the aorta and the pulmonary artery that should close shortly after birth but fails to do so.
4. Atresia: The absence of an opening between the two lower chambers (ventricles) of the heart, which can lead to a lack of oxygenation of the body.

Heart septal defects can be caused by genetic factors or environmental factors such as maternal viral infections during pregnancy. They are often diagnosed during infancy or early childhood, and treatment options may include medication, surgery, or catheter-based procedures to close the abnormal opening or hole.

Untreated heart septal defects can lead to complications such as heart failure, atrial arrhythmias, and lung damage. However, with timely and appropriate treatment, many individuals with heart septal defects can lead normal, active lives with minimal long-term effects.

Symptoms of HLHS may include:

1. Blue tint to the skin, lips, and nails (cyanosis)
2. Rapid breathing
3. Fatigue
4. Poor feeding or inability to gain weight
5. Weak or absent pulse in the left arm or leg

Diagnosis of HLHS is typically made prenatally by ultrasound examination, and may also be confirmed after birth by echocardiogram or other diagnostic tests.

Treatment for HLHS usually involves a series of surgeries and catheterizations to repair or replace the affected heart structures. These procedures may include:

1. Shunt procedure: A small tube is placed between the right and left sides of the heart to allow oxygenated blood to flow to the underdeveloped left side.
2. Bidirectional Glenn procedure: A surgical procedure that connects the pulmonary artery to the aortic valve, allowing blood to be pumped to both the lungs and the body.
3. Fontan procedure: A surgical procedure that redirects blood flow from the upper body to the lungs, bypassing the underdeveloped left ventricle.
4. Heart transplantation: In some cases, a heart transplant may be necessary if other procedures are not successful or if there is significant damage to the heart.

Early detection and treatment of HLHS are crucial to prevent complications and improve outcomes. Children with HLHS require close monitoring and frequent medical evaluations throughout their lives to manage any potential issues that may arise. With appropriate treatment, many individuals with HLHS can lead active and productive lives well into adulthood.

Heart neoplasms, also known as cardiac tumors, are abnormal growths that occur within the heart muscle or on the surface of the heart. These tumors can be benign (non-cancerous) or malignant (cancerous). Malignant heart tumors are rare but can be aggressive and potentially life-threatening.

Types of Heart Neoplasms:

1. Benign tumors: These include fibromas, lipomas, and teratomas, which are usually slow-growing and do not spread to other parts of the body.
2. Malignant tumors: These include sarcomas, carcinomas, and lymphomas, which can be more aggressive and may spread to other parts of the body.

Causes and Risk Factors:

The exact cause of heart neoplasms is not fully understood, but several factors have been linked to an increased risk of developing these tumors. These include:

1. Genetic mutations: Some heart neoplasms may be caused by inherited genetic mutations.
2. Viral infections: Some viruses, such as human T-lymphotropic virus (HTLV-1), have been linked to an increased risk of developing heart tumors.
3. Radiation exposure: Radiation therapy to the chest area can increase the risk of developing heart tumors.
4. Previous heart surgery: People who have had previous heart surgery may be at higher risk of developing heart neoplasms.

Symptoms and Diagnosis:

The symptoms of heart neoplasms can vary depending on the size and location of the tumor. They may include:

1. Chest pain or discomfort
2. Shortness of breath
3. Fatigue
4. Palpitations
5. Swelling in the legs, ankles, or feet

Diagnosis is typically made through a combination of physical examination, medical history, and diagnostic tests such as electrocardiograms (ECGs), echocardiograms, and cardiac imaging studies. A biopsy may be necessary to confirm the diagnosis.

Treatment and Prognosis:

The treatment of heart neoplasms depends on the type, size, and location of the tumor, as well as the patient's overall health. Treatment options may include:

1. Watchful waiting: Small, benign tumors may not require immediate treatment and can be monitored with regular check-ups.
2. Surgery: Surgical removal of the tumor may be necessary for larger or more aggressive tumors.
3. Chemotherapy: Chemotherapy drugs may be used to shrink the tumor before surgery or to treat any remaining cancer cells after surgery.
4. Radiation therapy: Radiation therapy may be used to treat heart neoplasms that are difficult to remove with surgery or that have returned after previous treatment.

The prognosis for heart neoplasms varies depending on the type and location of the tumor, as well as the patient's overall health. In general, the earlier the diagnosis and treatment, the better the prognosis. However, some heart neoplasms can be aggressive and may have a poor prognosis despite treatment.

Complications:

Heart neoplasms can cause a variety of complications, including:

1. Heart failure: Tumors that obstruct the heart's pumping activity can lead to heart failure.
2. Arrhythmias: Tumors can disrupt the heart's electrical activity and cause arrhythmias (abnormal heart rhythms).
3. Thrombus formation: Tumors can increase the risk of blood clots forming within the heart.
4. Septicemia: Bacterial infections can occur within the tumor, leading to septicemia (blood poisoning).
5. Respiratory failure: Large tumors can compress the lungs and lead to respiratory failure.

Conclusion:

Heart neoplasms are rare but potentially life-threatening conditions that require prompt diagnosis and treatment. While some heart neoplasms are benign, others can be aggressive and may have a poor prognosis despite treatment. It is essential to seek medical attention if symptoms persist or worsen over time, as early detection and treatment can improve outcomes.

The burden of chronic diseases is significant, with over 70% of deaths worldwide attributed to them, according to the World Health Organization (WHO). In addition to the physical and emotional toll they take on individuals and their families, chronic diseases also pose a significant economic burden, accounting for a large proportion of healthcare expenditure.

In this article, we will explore the definition and impact of chronic diseases, as well as strategies for managing and living with them. We will also discuss the importance of early detection and prevention, as well as the role of healthcare providers in addressing the needs of individuals with chronic diseases.

What is a Chronic Disease?

A chronic disease is a condition that lasts for an extended period of time, often affecting daily life and activities. Unlike acute diseases, which have a specific beginning and end, chronic diseases are long-term and persistent. Examples of chronic diseases include:

1. Diabetes
2. Heart disease
3. Arthritis
4. Asthma
5. Cancer
6. Chronic obstructive pulmonary disease (COPD)
7. Chronic kidney disease (CKD)
8. Hypertension
9. Osteoporosis
10. Stroke

Impact of Chronic Diseases

The burden of chronic diseases is significant, with over 70% of deaths worldwide attributed to them, according to the WHO. In addition to the physical and emotional toll they take on individuals and their families, chronic diseases also pose a significant economic burden, accounting for a large proportion of healthcare expenditure.

Chronic diseases can also have a significant impact on an individual's quality of life, limiting their ability to participate in activities they enjoy and affecting their relationships with family and friends. Moreover, the financial burden of chronic diseases can lead to poverty and reduce economic productivity, thus having a broader societal impact.

Addressing Chronic Diseases

Given the significant burden of chronic diseases, it is essential that we address them effectively. This requires a multi-faceted approach that includes:

1. Lifestyle modifications: Encouraging healthy behaviors such as regular physical activity, a balanced diet, and smoking cessation can help prevent and manage chronic diseases.
2. Early detection and diagnosis: Identifying risk factors and detecting diseases early can help prevent or delay their progression.
3. Medication management: Effective medication management is crucial for controlling symptoms and slowing disease progression.
4. Multi-disciplinary care: Collaboration between healthcare providers, patients, and families is essential for managing chronic diseases.
5. Health promotion and disease prevention: Educating individuals about the risks of chronic diseases and promoting healthy behaviors can help prevent their onset.
6. Addressing social determinants of health: Social determinants such as poverty, education, and employment can have a significant impact on health outcomes. Addressing these factors is essential for reducing health disparities and improving overall health.
7. Investing in healthcare infrastructure: Investing in healthcare infrastructure, technology, and research is necessary to improve disease detection, diagnosis, and treatment.
8. Encouraging policy change: Policy changes can help create supportive environments for healthy behaviors and reduce the burden of chronic diseases.
9. Increasing public awareness: Raising public awareness about the risks and consequences of chronic diseases can help individuals make informed decisions about their health.
10. Providing support for caregivers: Chronic diseases can have a significant impact on family members and caregivers, so providing them with support is essential for improving overall health outcomes.

Conclusion

Chronic diseases are a major public health burden that affect millions of people worldwide. Addressing these diseases requires a multi-faceted approach that includes lifestyle changes, addressing social determinants of health, investing in healthcare infrastructure, encouraging policy change, increasing public awareness, and providing support for caregivers. By taking a comprehensive approach to chronic disease prevention and management, we can improve the health and well-being of individuals and communities worldwide.

1) They share similarities with humans: Many animal species share similar biological and physiological characteristics with humans, making them useful for studying human diseases. For example, mice and rats are often used to study diseases such as diabetes, heart disease, and cancer because they have similar metabolic and cardiovascular systems to humans.

2) They can be genetically manipulated: Animal disease models can be genetically engineered to develop specific diseases or to model human genetic disorders. This allows researchers to study the progression of the disease and test potential treatments in a controlled environment.

3) They can be used to test drugs and therapies: Before new drugs or therapies are tested in humans, they are often first tested in animal models of disease. This allows researchers to assess the safety and efficacy of the treatment before moving on to human clinical trials.

4) They can provide insights into disease mechanisms: Studying disease models in animals can provide valuable insights into the underlying mechanisms of a particular disease. This information can then be used to develop new treatments or improve existing ones.

5) Reduces the need for human testing: Using animal disease models reduces the need for human testing, which can be time-consuming, expensive, and ethically challenging. However, it is important to note that animal models are not perfect substitutes for human subjects, and results obtained from animal studies may not always translate to humans.

6) They can be used to study infectious diseases: Animal disease models can be used to study infectious diseases such as HIV, TB, and malaria. These models allow researchers to understand how the disease is transmitted, how it progresses, and how it responds to treatment.

7) They can be used to study complex diseases: Animal disease models can be used to study complex diseases such as cancer, diabetes, and heart disease. These models allow researchers to understand the underlying mechanisms of the disease and test potential treatments.

8) They are cost-effective: Animal disease models are often less expensive than human clinical trials, making them a cost-effective way to conduct research.

9) They can be used to study drug delivery: Animal disease models can be used to study drug delivery and pharmacokinetics, which is important for developing new drugs and drug delivery systems.

10) They can be used to study aging: Animal disease models can be used to study the aging process and age-related diseases such as Alzheimer's and Parkinson's. This allows researchers to understand how aging contributes to disease and develop potential treatments.

There are several types of heart septal defects, including atrial septal defects, ventricular septal defects, and mitral valve defects. Ventricular septal defects are the most common type and occur when there is an abnormal opening in the wall between the right and left ventricles.

Symptoms of heart septal defects can include shortness of breath, fatigue, and swelling in the legs and feet. In some cases, the defect may not cause any symptoms at all until later in life.

Diagnosis of heart septal defects is typically made using echocardiography, electrocardiography (ECG), or chest X-rays. Treatment options vary depending on the severity of the defect and can include medication to manage symptoms, surgery to repair the defect, or catheter procedures to close the opening. In some cases, heart septal defects may be treated with a procedure called balloon atrial septostomy, in which a balloon is inserted through a catheter into the abnormal opening and inflated to close it.

Prognosis for patients with heart septal defects depends on the severity of the defect and the presence of any other congenital heart defects. In general, early diagnosis and treatment can improve outcomes and reduce the risk of complications such as heart failure, arrhythmias, and endocardrial infection.

In summary, heart septal defects, ventricular type, are congenital heart defects that occur when there is an abnormal opening in the wall between the right and left ventricles of the heart. Symptoms can include shortness of breath, fatigue, and swelling in the legs and feet. Diagnosis is typically made using echocardiography, electrocardiography (ECG), or chest X-rays. Treatment options vary depending on the severity of the defect and can include medication, surgery, or catheter procedures. Prognosis is generally good for patients with heart septal defects if they receive early diagnosis and treatment.



The symptoms of myocarditis can vary depending on the severity of the inflammation and the location of the affected areas of the heart muscle. Common symptoms include chest pain, shortness of breath, fatigue, and swelling in the legs and feet.

Myocarditis can be difficult to diagnose, as its symptoms are similar to those of other conditions such as coronary artery disease or heart failure. Diagnosis is typically made through a combination of physical examination, medical history, and results of diagnostic tests such as electrocardiogram (ECG), echocardiogram, and blood tests.

Treatment of myocarditis depends on the underlying cause and severity of the condition. Mild cases may require only rest and over-the-counter pain medication, while more severe cases may require hospitalization and intravenous medications to manage inflammation and cardiac function. In some cases, surgery may be necessary to repair or replace damaged heart tissue.

Prevention of myocarditis is important, as it can lead to serious complications such as heart failure and arrhythmias if left untreated. Prevention strategies include avoiding exposure to viruses and other infections, managing underlying medical conditions such as diabetes and high blood pressure, and getting regular check-ups with a healthcare provider to monitor cardiac function.

In summary, myocarditis is an inflammatory condition that affects the heart muscle, causing symptoms such as chest pain, shortness of breath, and fatigue. Diagnosis can be challenging, but treatment options range from rest and medication to hospitalization and surgery. Prevention is key to avoiding serious complications and maintaining good cardiac health.

1. Coronary artery disease: The narrowing or blockage of the coronary arteries, which supply blood to the heart.
2. Heart failure: A condition in which the heart is unable to pump enough blood to meet the body's needs.
3. Arrhythmias: Abnormal heart rhythms that can be too fast, too slow, or irregular.
4. Heart valve disease: Problems with the heart valves that control blood flow through the heart.
5. Heart muscle disease (cardiomyopathy): Disease of the heart muscle that can lead to heart failure.
6. Congenital heart disease: Defects in the heart's structure and function that are present at birth.
7. Peripheral artery disease: The narrowing or blockage of blood vessels that supply oxygen and nutrients to the arms, legs, and other organs.
8. Deep vein thrombosis (DVT): A blood clot that forms in a deep vein, usually in the leg.
9. Pulmonary embolism: A blockage in one of the arteries in the lungs, which can be caused by a blood clot or other debris.
10. Stroke: A condition in which there is a lack of oxygen to the brain due to a blockage or rupture of blood vessels.

LVH can lead to a number of complications, including:

1. Heart failure: The enlarged left ventricle can become less efficient at pumping blood throughout the body, leading to heart failure.
2. Arrhythmias: The abnormal electrical activity in the heart can lead to irregular heart rhythms.
3. Sudden cardiac death: In some cases, LVH can increase the risk of sudden cardiac death.
4. Atrial fibrillation: The enlarged left atrium can lead to atrial fibrillation, a common type of arrhythmia.
5. Mitral regurgitation: The enlargement of the left ventricle can cause the mitral valve to become incompetent, leading to mitral regurgitation.
6. Heart valve problems: The enlarged left ventricle can lead to heart valve problems, such as mitral regurgitation or aortic stenosis.
7. Coronary artery disease: LVH can increase the risk of coronary artery disease, which can lead to a heart attack.
8. Pulmonary hypertension: The enlarged left ventricle can lead to pulmonary hypertension, which can further strain the heart and increase the risk of complications.

Evaluation of LVH typically involves a physical examination, medical history, electrocardiogram (ECG), echocardiography, and other diagnostic tests such as stress test or cardiac MRI. Treatment options for LVH depend on the underlying cause and may include medications, lifestyle changes, and in some cases, surgery or other interventions.

There are several types of ventricular dysfunction, including:

1. Left ventricular dysfunction: This occurs when the left ventricle, which is the main pumping chamber of the heart, becomes weakened or impaired. This can lead to reduced cardiac output and can increase the risk of heart failure.
2. Right ventricular dysfunction: This occurs when the right ventricle, which pumps blood into the lungs, becomes weakened or impaired. This can lead to pulmonary hypertension and other complications.
3. Biventricular dysfunction: This occurs when both the left and right ventricles become weakened or impaired. This can lead to severe cardiac impairment and increased risk of heart failure.

Ventricular dysfunction can be diagnosed through a variety of tests, including echocardiography, stress testing, and cardiac magnetic resonance imaging (MRI). Treatment options depend on the underlying cause of the dysfunction and may include medications, lifestyle changes, or surgical interventions. In some cases, implantable devices such as pacemakers or defibrillators may be recommended to help regulate the heart rhythm and improve function.

Fibrosis can occur in response to a variety of stimuli, including inflammation, infection, injury, or chronic stress. It is a natural healing process that helps to restore tissue function and structure after damage or trauma. However, excessive fibrosis can lead to the loss of tissue function and organ dysfunction.

There are many different types of fibrosis, including:

* Cardiac fibrosis: the accumulation of scar tissue in the heart muscle or walls, leading to decreased heart function and potentially life-threatening complications.
* Pulmonary fibrosis: the accumulation of scar tissue in the lungs, leading to decreased lung function and difficulty breathing.
* Hepatic fibrosis: the accumulation of scar tissue in the liver, leading to decreased liver function and potentially life-threatening complications.
* Neurofibromatosis: a genetic disorder characterized by the growth of benign tumors (neurofibromas) made up of fibrous connective tissue.
* Desmoid tumors: rare, slow-growing tumors that are made up of fibrous connective tissue and can occur in various parts of the body.

Fibrosis can be diagnosed through a variety of methods, including:

* Biopsy: the removal of a small sample of tissue for examination under a microscope.
* Imaging tests: such as X-rays, CT scans, or MRI scans to visualize the accumulation of scar tissue.
* Blood tests: to assess liver function or detect specific proteins or enzymes that are elevated in response to fibrosis.

There is currently no cure for fibrosis, but various treatments can help manage the symptoms and slow the progression of the condition. These may include:

* Medications: such as corticosteroids, immunosuppressants, or chemotherapy to reduce inflammation and slow down the growth of scar tissue.
* Lifestyle modifications: such as quitting smoking, exercising regularly, and maintaining a healthy diet to improve overall health and reduce the progression of fibrosis.
* Surgery: in some cases, surgical removal of the affected tissue or organ may be necessary.

It is important to note that fibrosis can progress over time, leading to further scarring and potentially life-threatening complications. Regular monitoring and follow-up with a healthcare professional are crucial to managing the condition and detecting any changes or progression early on.

There are several types of tachycardia, including:

1. Sinus tachycardia: This is the most common type and is caused by an increase in the rate of the normal sinus node. It is often seen in response to physical activity or stress.
2. Atrial fibrillation: This is a type of arrhythmia where the heart's upper chambers (atria) contract irregularly and rapidly, leading to a rapid heart rate.
3. Ventricular tachycardia: This is a type of arrhythmia where the heart's lower chambers (ventricles) contract rapidly, often with a rate above 100 bpm.
4. Premature ventricular contractions (PVCs): These are early or extra beats that originate in the ventricles, causing a rapid heart rate.

Tachycardia can cause a range of symptoms, including palpitations, shortness of breath, chest pain, and dizziness. In severe cases, it can lead to cardiac arrhythmias, heart failure, and even death.

Diagnosis of tachycardia typically involves a physical examination, electrocardiogram (ECG), and other tests such as stress tests or echocardiography. Treatment options vary depending on the underlying cause, but may include medications to regulate the heart rate, cardioversion to restore a normal heart rhythm, or in severe cases, implantation of a pacemaker or defibrillator.

Some examples of the use of 'Death, Sudden, Cardiac' in medical contexts include:

1. Sudden cardiac death (SCD) is a major public health concern, affecting thousands of people each year in the United States alone. It is often caused by inherited heart conditions, such as hypertrophic cardiomyopathy or long QT syndrome.
2. The risk of sudden cardiac death is higher for individuals with a family history of heart disease or other pre-existing cardiovascular conditions.
3. Sudden cardiac death can be prevented by prompt recognition and treatment of underlying heart conditions, as well as by avoiding certain risk factors such as smoking, physical inactivity, and an unhealthy diet.
4. Cardiopulmonary resuscitation (CPR) and automated external defibrillators (AEDs) can be effective in restoring a normal heart rhythm during sudden cardiac death, especially when used promptly after the onset of symptoms.

There are several risk factors for developing AF, including:

1. Age: The risk of developing AF increases with age, with the majority of cases occurring in people over the age of 65.
2. Hypertension (high blood pressure): High blood pressure can damage the heart and increase the risk of developing AF.
3. Heart disease: People with heart disease, such as coronary artery disease or heart failure, are at higher risk of developing AF.
4. Diabetes mellitus: Diabetes can increase the risk of developing AF.
5. Sleep apnea: Sleep apnea can increase the risk of developing AF.
6. Certain medications: Certain medications, such as thyroid medications and asthma medications, can increase the risk of developing AF.
7. Alcohol consumption: Excessive alcohol consumption has been linked to an increased risk of developing AF.
8. Smoking: Smoking is a risk factor for many cardiovascular conditions, including AF.
9. Obesity: Obesity is a risk factor for many cardiovascular conditions, including AF.

Symptoms of AF can include:

1. Palpitations (rapid or irregular heartbeat)
2. Shortness of breath
3. Fatigue
4. Dizziness or lightheadedness
5. Chest pain or discomfort

AF can be diagnosed with the help of several tests, including:

1. Electrocardiogram (ECG): This is a non-invasive test that measures the electrical activity of the heart.
2. Holter monitor: This is a portable device that records the heart's rhythm over a 24-hour period.
3. Event monitor: This is a portable device that records the heart's rhythm over a longer period of time, usually 1-2 weeks.
4. Echocardiogram: This is an imaging test that uses sound waves to create pictures of the heart.
5. Cardiac MRI: This is an imaging test that uses magnetic fields and radio waves to create detailed pictures of the heart.

Treatment for AF depends on the underlying cause and may include medications, such as:

1. Beta blockers: These medications slow the heart rate and reduce the force of the heart's contractions.
2. Antiarrhythmics: These medications help regulate the heart's rhythm.
3. Blood thinners: These medications prevent blood clots from forming and can help reduce the risk of stroke.
4. Calcium channel blockers: These medications slow the entry of calcium into the heart muscle cells, which can help slow the heart rate and reduce the force of the heart's contractions.

In some cases, catheter ablation may be recommended to destroy the abnormal electrical pathway causing AF. This is a minimally invasive procedure that involves inserting a catheter through a vein in the leg and guiding it to the heart using x-ray imaging. Once the catheter is in place, energy is applied to the abnormal electrical pathway to destroy it and restore a normal heart rhythm.

It's important to note that AF can increase the risk of stroke, so anticoagulation therapy may be recommended to reduce this risk. This can include medications such as warfarin or aspirin, or in some cases, implantable devices such as a left atrial appendage closure device.

In conclusion, atrial fibrillation is a common heart rhythm disorder that can increase the risk of stroke and heart failure. Treatment options depend on the underlying cause and may include medications, cardioversion, catheter ablation, or anticoagulation therapy. It's important to work closely with a healthcare provider to determine the best course of treatment for AF.

In Vfib, the electrical activity of the heart becomes disorganized, leading to a fibrillatory pattern of contraction. This means that the ventricles are contracting in a rapid, unsynchronized manner, rather than the coordinated, synchronized contractions that occur in normal heart function.

Vfib can be caused by a variety of factors, including coronary artery disease, heart attack, cardiomyopathy, and electrolyte imbalances. It can also be triggered by certain medications, such as digoxin, or by electrical shocks to the heart.

Symptoms of Vfib include palpitations, shortness of breath, chest pain, and loss of consciousness. If not treated promptly, Vfib can lead to cardiac arrest and death.

Treatment of Vfib typically involves electrical cardioversion, which involves delivering an electric shock to the heart to restore a normal heart rhythm. In some cases, medications may also be used to help regulate the heart rhythm. In more severe cases, surgery or other interventions may be necessary to address any underlying causes of Vfib.

Overall, ventricular fibrillation is a serious medical condition that requires prompt treatment to prevent complications and ensure effective cardiac function.

Body weight is an important health indicator, as it can affect an individual's risk for certain medical conditions, such as obesity, diabetes, and cardiovascular disease. Maintaining a healthy body weight is essential for overall health and well-being, and there are many ways to do so, including a balanced diet, regular exercise, and other lifestyle changes.

There are several ways to measure body weight, including:

1. Scale: This is the most common method of measuring body weight, and it involves standing on a scale that displays the individual's weight in kg or lb.
2. Body fat calipers: These are used to measure body fat percentage by pinching the skin at specific points on the body.
3. Skinfold measurements: This method involves measuring the thickness of the skin folds at specific points on the body to estimate body fat percentage.
4. Bioelectrical impedance analysis (BIA): This is a non-invasive method that uses electrical impulses to measure body fat percentage.
5. Dual-energy X-ray absorptiometry (DXA): This is a more accurate method of measuring body composition, including bone density and body fat percentage.

It's important to note that body weight can fluctuate throughout the day due to factors such as water retention, so it's best to measure body weight at the same time each day for the most accurate results. Additionally, it's important to use a reliable scale or measuring tool to ensure accurate measurements.

In medicine, cyanosis is often used as an indication of the severity of a patient's condition. For example, a patient with severe cyanosis may have a more serious underlying condition than a patient with mild cyanosis. Additionally, cyanosis can be used to monitor the effectiveness of treatment and to determine when further interventions are necessary.

Cyanosis can be diagnosed through physical examination, blood tests, and other diagnostic procedures such as pulse oximetry or arterial blood gas analysis. Treatment for cyanosis depends on the underlying cause and may include oxygen therapy, medication, or surgical intervention.

In summary, cyanosis is a condition characterized by a bluish discoloration of the skin and mucous membranes due to inadequate oxygenation of the body's tissues. It is an important sign of underlying disease and can be used to assess the severity of a patient's condition and monitor the effectiveness of treatment.

There are different types of anoxia, including:

1. Cerebral anoxia: This occurs when the brain does not receive enough oxygen, leading to cognitive impairment, confusion, and loss of consciousness.
2. Pulmonary anoxia: This occurs when the lungs do not receive enough oxygen, leading to shortness of breath, coughing, and chest pain.
3. Cardiac anoxia: This occurs when the heart does not receive enough oxygen, leading to cardiac arrest and potentially death.
4. Global anoxia: This is a complete lack of oxygen to the entire body, leading to widespread tissue damage and death.

Treatment for anoxia depends on the underlying cause and the severity of the condition. In some cases, hospitalization may be necessary to provide oxygen therapy, pain management, and other supportive care. In severe cases, anoxia can lead to long-term disability or death.

Prevention of anoxia is important, and this includes managing underlying medical conditions such as heart disease, diabetes, and respiratory problems. It also involves avoiding activities that can lead to oxygen deprivation, such as scuba diving or high-altitude climbing, without proper training and equipment.

In summary, anoxia is a serious medical condition that occurs when there is a lack of oxygen in the body or specific tissues or organs. It can cause cell death and tissue damage, leading to serious health complications and even death if left untreated. Early diagnosis and treatment are crucial to prevent long-term disability or death.

The exact cause of endomyocardial fibrosis is not known, but it is believed to be related to inflammation and scarring within the heart. The condition is more common in men than women, and typically affects people between the ages of 20 and 50. Symptoms of endomyocardial fibrosis can include shortness of breath, fatigue, swelling in the legs and feet, and chest pain.

There is no cure for endomyocardial fibrosis, but treatment options may include medications to manage symptoms, surgery to repair or replace damaged heart tissue, and lifestyle changes such as a healthy diet and regular exercise. In severe cases, heart transplantation may be necessary. Early diagnosis and treatment can help slow the progression of the condition and improve quality of life for those affected.

There are different types of heart aneurysms, including:

1. Left ventricular aneurysm: This is the most common type and occurs in the left lower chamber of the heart (left ventricle).
2. Right ventricular aneurysm: This type occurs in the right lower chamber of the heart (right ventricle).
3. Mitral valve aneurysm: This type occurs near the mitral valve, which separates the left atrium and left ventricle.
4. Tricuspid valve aneurysm: This type occurs near the tricuspid valve, which separates the right atrium and right ventricle.

Heart aneurysms can cause symptoms such as chest pain, shortness of breath, and fatigue. In some cases, they may not cause any symptoms until they rupture, leading to life-threatening complications.

Diagnosis of a heart aneurysm is typically made through imaging tests such as echocardiography, cardiac MRI, or CT scans. Treatment options for heart aneurysms depend on the size and location of the aneurysm, as well as the patient's overall health. Treatment may involve medications to control blood pressure and prevent further enlargement of the aneurysm, or in some cases, surgery may be necessary to repair or replace the affected heart muscle or valve.

Prognosis for heart aneurysms varies depending on the size and location of the aneurysm, as well as the patient's overall health. In general, early detection and treatment can improve outcomes and reduce the risk of complications.

Tachycardia, ventricular can be classified into several types based on its duration and the presence of other symptoms. These include:

1. Paroxysmal ventricular tachycardia (PVT): This is a rapid heart rate that occurs in episodes lasting less than 30 seconds and may be accompanied by palpitations, shortness of breath, or dizziness.
2. Sustained ventricular tachycardia: This is a rapid heart rate that persists for more than 30 seconds and may require medical intervention to return the heart to normal rhythm.
3. Ventricular fibrillation (VF): This is a life-threatening condition in which the ventricles are unable to pump blood effectively due to rapid, disorganized electrical activity.

Symptoms of tachycardia, ventricular may include:

* Palpitations or rapid heartbeat
* Shortness of breath
* Dizziness or lightheadedness
* Chest pain or discomfort
* Fatigue or weakness

Diagnosis of tachycardia, ventricular is typically made based on a physical examination, medical history, and results of diagnostic tests such as electrocardiogram (ECG), echocardiogram, or stress test. Treatment options may include medications to regulate heart rhythm, cardioversion to restore normal heart rhythm, and in some cases, implantation of a cardioverter-defibrillator (ICD) to prevent sudden death.

In summary, tachycardia, ventricular is a rapid heart rate that originates in the ventricles and can be caused by a variety of conditions. It is important to seek medical attention if symptoms persist or worsen over time. With proper diagnosis and treatment, it is possible to manage the condition and improve quality of life.

The term "pulmonary heart disease" is sometimes used interchangeably with "pulmonary hypertension," but they are not exactly the same thing. Pulmonary hypertension refers specifically to high blood pressure in the lungs, while pulmonary heart disease is a broader term that includes both high blood pressure and other conditions that affect the heart and lungs.

Pulmonary heart disease can be caused by a variety of factors, including:

1. Pulmonary embolism (a blood clot in the lungs)
2. Chronic obstructive pulmonary disease (COPD)
3. Sleep apnea
4. Congenital heart defects
5. Cardiomyopathy (a condition where the heart muscle becomes weakened or enlarged)
6. Heart valve problems
7. Lupus (an autoimmune disease)
8. Rheumatoid arthritis (an autoimmune disease)
9. Scleroderma (a connective tissue disease)
10. Raynaud's phenomenon (a condition that affects blood flow to the fingers and toes)

Symptoms of pulmonary heart disease can include:

1. Shortness of breath
2. Fatigue
3. Dizziness or lightheadedness
4. Swelling in the legs, ankles, and feet
5. Chest pain
6. Coughing up pink, frothy liquid (called pulmonary edema)

If you suspect you may have pulmonary heart disease, it is important to seek medical attention as soon as possible. A healthcare provider can perform tests such as an electrocardiogram (ECG), echocardiogram, and chest X-ray to determine the cause of your symptoms and develop a treatment plan.

Treatment for pulmonary heart disease may include:

1. Medications to lower blood pressure and improve lung function
2. Oxygen therapy to increase oxygen levels in the blood
3. Surgery to repair or replace damaged heart valves
4. Lifestyle changes such as quitting smoking, exercising regularly, and eating a healthy diet

It is important to follow your healthcare provider's treatment plan and attend regular follow-up appointments to monitor your condition and adjust your treatment as needed. With proper treatment and lifestyle changes, many people with pulmonary heart disease are able to manage their symptoms and improve their quality of life.

Examples of acute diseases include:

1. Common cold and flu
2. Pneumonia and bronchitis
3. Appendicitis and other abdominal emergencies
4. Heart attacks and strokes
5. Asthma attacks and allergic reactions
6. Skin infections and cellulitis
7. Urinary tract infections
8. Sinusitis and meningitis
9. Gastroenteritis and food poisoning
10. Sprains, strains, and fractures.

Acute diseases can be treated effectively with antibiotics, medications, or other therapies. However, if left untreated, they can lead to chronic conditions or complications that may require long-term care. Therefore, it is important to seek medical attention promptly if symptoms persist or worsen over time.

The exact cause of HCM is not fully understood, but it is thought to be related to a combination of genetic and environmental factors. Some people with HCM have a family history of the condition, and it is also more common in certain populations such as athletes and individuals with a history of hypertension or diabetes.

Symptoms of HCM can vary from person to person and may include shortness of breath, fatigue, palpitations, and chest pain. In some cases, HCM may not cause any symptoms at all and may be detected only through a physical examination or diagnostic tests such as an echocardiogram or electrocardiogram (ECG).

Treatment for HCM typically focuses on managing symptoms and reducing the risk of complications. This may include medications to reduce blood pressure, control arrhythmias, or improve heart function, as well as lifestyle modifications such as regular exercise and a healthy diet. In some cases, surgery or other procedures may be necessary to treat HCM.

Prognosis for individuals with HCM varies depending on the severity of the condition and the presence of any complications. With appropriate treatment and management, many people with HCM can lead active and fulfilling lives, but it is important to receive regular monitoring and care from a healthcare provider to manage the condition effectively.

Angina pectoris is a medical condition that is characterized by recurring chest pain or discomfort due to reduced blood flow and oxygen supply to the heart muscle, specifically the myocardium. It is also known as stable angina or effort angina. The symptoms of angina pectoris typically occur during physical activity or emotional stress and are relieved by rest.

The term "angina" comes from the Latin word for "strangulation," which refers to the feeling of tightness or constriction in the chest that is associated with the condition. Angina pectoris can be caused by atherosclerosis, or the buildup of plaque in the coronary arteries, which supply blood to the heart muscle. This buildup can lead to the formation of atherosclerotic plaques that can narrow the coronary arteries and reduce blood flow to the heart muscle, causing chest pain.

There are several types of angina pectoris, including:

1. Stable angina: This is the most common type of angina and is characterized by predictable and reproducible symptoms that occur during specific situations or activities, such as exercise or emotional stress.
2. Unstable angina: This type of angina is characterized by unpredictable and changing symptoms that can occur at rest or with minimal exertion. It is often a sign of a more severe underlying condition, such as a heart attack.
3. Variant angina: This type of angina occurs during physical activity, but the symptoms are not relieved by rest.
4. Prinzmetal's angina: This is a rare type of angina that occurs at rest and is characterized by a feeling of tightness or constriction in the chest.

The diagnosis of angina pectoris is typically made based on a combination of physical examination, medical history, and diagnostic tests such as electrocardiogram (ECG), stress test, and imaging studies. Treatment for angina pectoris usually involves lifestyle modifications, such as regular exercise, a healthy diet, and stress management, as well as medications to relieve symptoms and reduce the risk of complications. In some cases, surgery or other procedures may be necessary to treat the underlying condition causing the angina.

When the sinus node is not functioning properly, it can lead to an arrhythmia, or irregular heartbeat. This can cause a variety of symptoms, including palpitations, shortness of breath, fatigue, and dizziness. In some cases, sinus arrhythmia can be caused by underlying medical conditions such as coronary artery disease, high blood pressure, or cardiomyopathy.

There are several types of sinus arrhythmia, including:

* Sinus tachycardia: a rapid heart rate due to an overactive sinus node. This can be caused by stress, anxiety, or physical exertion.
* Sinus bradycardia: a slow heart rate due to a decreased activity in the sinus node. This can be caused by certain medications, age, or underlying medical conditions.
* Sinus arrest: a complete cessation of sinus node activity, leading to a stop in the heartbeat. This is a rare condition and can be caused by a variety of factors, including electrolyte imbalances or certain medications.

Treatment for sinus arrhythmia depends on the underlying cause and the severity of symptoms. In some cases, no treatment may be necessary, while in other cases, medication or procedures such as cardioversion or catheter ablation may be required. It is important to seek medical attention if symptoms persist or worsen over time, as untreated sinus arrhythmia can lead to more serious complications such as stroke or heart failure.

www.medicinenet.com/sudden_death/article.htm
Sudden death is death that occurs unexpectedly and without warning, often due to a cardiac arrest or other underlying medical condition.

In the medical field, sudden death is defined as death that occurs within one hour of the onset of symptoms, with no prior knowledge of any serious medical condition. It is often caused by a cardiac arrhythmia, such as ventricular fibrillation or tachycardia, which can lead to cardiac arrest and sudden death if not treated promptly.

Other possible causes of sudden death include:

1. Heart disease: Coronary artery disease, heart failure, and other heart conditions can increase the risk of sudden death.
2. Stroke: A stroke can cause sudden death by disrupting blood flow to the brain or other vital organs.
3. Pulmonary embolism: A blood clot in the lungs can block blood flow and cause sudden death.
4. Trauma: Sudden death can occur as a result of injuries sustained in an accident or other traumatic event.
5. Drug overdose: Taking too much of certain medications or drugs can cause sudden death due to cardiac arrest or respiratory failure.
6. Infections: Sepsis, meningitis, and other severe infections can lead to sudden death if left untreated.
7. Genetic conditions: Certain inherited disorders, such as Long QT syndrome, can increase the risk of sudden death due to cardiac arrhythmias.

The diagnosis of sudden death often requires an autopsy and a thorough investigation into the individual's medical history and circumstances surrounding their death. Treatment and prevention strategies may include defibrillation, CPR, medications to regulate heart rhythm, and lifestyle modifications to reduce risk factors such as obesity, smoking, and high blood pressure.

The mitral valve is located between the left atrium and the left ventricle, and it is responsible for regulating blood flow between these two chambers. When the mitral valve does not close properly, blood can leak back into the left atrium, causing a range of symptoms and complications.

There are several causes of mitral valve insufficiency, including:

* Degenerative changes: The mitral valve can wear out over time due to degenerative changes, such as calcium buildup or tearing of the valve flaps.
* Heart muscle disease: Diseases such as cardiomyopathy can cause the heart muscle to weaken and stretch, leading to mitral valve insufficiency.
* Endocarditis: Infections of the inner lining of the heart can damage the mitral valve and lead to insufficiency.
* Heart defects: Congenital heart defects, such as a bicuspid valve or a narrow valve opening, can lead to mitral valve insufficiency.

Treatment for mitral valve insufficiency depends on the severity of the condition and may include medications to manage symptoms, lifestyle changes, or surgery to repair or replace the damaged valve. In some cases, catheter-based procedures may be used to repair the valve without open-heart surgery.

Overall, mitral valve insufficiency is a common condition that can have a significant impact on quality of life if left untreated. It is important to seek medical attention if symptoms persist or worsen over time.

There are many different types of ANS diseases, including:

1. Dysautonomia: a general term that refers to dysfunction of the autonomic nervous system.
2. Postural orthostatic tachycardia syndrome (POTS): a condition characterized by rapid heart rate and other symptoms that occur upon standing.
3. Neurocardiogenic syncope: a form of fainting caused by a sudden drop in blood pressure.
4. Multiple system atrophy (MSA): a progressive neurodegenerative disorder that affects the autonomic nervous system and other parts of the brain.
5. Parkinson's disease: a neurodegenerative disorder that can cause autonomic dysfunction, including constipation, urinary incontinence, and erectile dysfunction.
6. Dopamine deficiency: a condition characterized by low levels of the neurotransmitter dopamine, which can affect the ANS and other body systems.
7. Autonomic nervous system disorders associated with autoimmune diseases, such as Guillain-Barré syndrome and lupus.
8. Trauma: physical or emotional trauma can sometimes cause dysfunction of the autonomic nervous system.
9. Infections: certain infections, such as Lyme disease, can affect the autonomic nervous system.
10. Genetic mutations: some genetic mutations can affect the functioning of the autonomic nervous system.

Treatment for ANS diseases depends on the specific condition and its underlying cause. In some cases, medication may be prescribed to regulate heart rate, blood pressure, or other bodily functions. Lifestyle changes, such as regular exercise and stress management techniques, can also be helpful in managing symptoms. In severe cases, surgery may be necessary to correct anatomical abnormalities or repair damaged nerves.

There are several types of diabetes mellitus, including:

1. Type 1 DM: This is an autoimmune condition in which the body's immune system attacks and destroys the cells in the pancreas that produce insulin, resulting in a complete deficiency of insulin production. It typically develops in childhood or adolescence, and patients with this condition require lifelong insulin therapy.
2. Type 2 DM: This is the most common form of diabetes, accounting for around 90% of all cases. It is caused by a combination of insulin resistance (where the body's cells do not respond properly to insulin) and impaired insulin secretion. It is often associated with obesity, physical inactivity, and a diet high in sugar and unhealthy fats.
3. Gestational DM: This type of diabetes develops during pregnancy, usually in the second or third trimester. Hormonal changes and insulin resistance can cause blood sugar levels to rise, putting both the mother and baby at risk.
4. LADA (Latent Autoimmune Diabetes in Adults): This is a form of type 1 DM that develops in adults, typically after the age of 30. It shares features with both type 1 and type 2 DM.
5. MODY (Maturity-Onset Diabetes of the Young): This is a rare form of diabetes caused by genetic mutations that affect insulin production. It typically develops in young adulthood and can be managed with lifestyle changes and/or medication.

The symptoms of diabetes mellitus can vary depending on the severity of the condition, but may include:

1. Increased thirst and urination
2. Fatigue
3. Blurred vision
4. Cuts or bruises that are slow to heal
5. Tingling or numbness in hands and feet
6. Recurring skin, gum, or bladder infections
7. Flu-like symptoms such as weakness, dizziness, and stomach pain
8. Dark, velvety skin patches (acanthosis nigricans)
9. Yellowish color of the skin and eyes (jaundice)
10. Delayed healing of cuts and wounds

If left untreated, diabetes mellitus can lead to a range of complications, including:

1. Heart disease and stroke
2. Kidney damage and failure
3. Nerve damage (neuropathy)
4. Eye damage (retinopathy)
5. Foot damage (neuropathic ulcers)
6. Cognitive impairment and dementia
7. Increased risk of infections and other diseases, such as pneumonia, gum disease, and urinary tract infections.

It is important to note that not all individuals with diabetes will experience these complications, and that proper management of the condition can greatly reduce the risk of developing these complications.

1. Infection: Bacterial or viral infections can develop after surgery, potentially leading to sepsis or organ failure.
2. Adhesions: Scar tissue can form during the healing process, which can cause bowel obstruction, chronic pain, or other complications.
3. Wound complications: Incisional hernias, wound dehiscence (separation of the wound edges), and wound infections can occur.
4. Respiratory problems: Pneumonia, respiratory failure, and atelectasis (collapsed lung) can develop after surgery, particularly in older adults or those with pre-existing respiratory conditions.
5. Cardiovascular complications: Myocardial infarction (heart attack), cardiac arrhythmias, and cardiac failure can occur after surgery, especially in high-risk patients.
6. Renal (kidney) problems: Acute kidney injury or chronic kidney disease can develop postoperatively, particularly in patients with pre-existing renal impairment.
7. Neurological complications: Stroke, seizures, and neuropraxia (nerve damage) can occur after surgery, especially in patients with pre-existing neurological conditions.
8. Pulmonary embolism: Blood clots can form in the legs or lungs after surgery, potentially causing pulmonary embolism.
9. Anesthesia-related complications: Respiratory and cardiac complications can occur during anesthesia, including respiratory and cardiac arrest.
10. delayed healing: Wound healing may be delayed or impaired after surgery, particularly in patients with pre-existing medical conditions.

It is important for patients to be aware of these potential complications and to discuss any concerns with their surgeon and healthcare team before undergoing surgery.

Disease progression can be classified into several types based on the pattern of worsening:

1. Chronic progressive disease: In this type, the disease worsens steadily over time, with a gradual increase in symptoms and decline in function. Examples include rheumatoid arthritis, osteoarthritis, and Parkinson's disease.
2. Acute progressive disease: This type of disease worsens rapidly over a short period, often followed by periods of stability. Examples include sepsis, acute myocardial infarction (heart attack), and stroke.
3. Cyclical disease: In this type, the disease follows a cycle of worsening and improvement, with periodic exacerbations and remissions. Examples include multiple sclerosis, lupus, and rheumatoid arthritis.
4. Recurrent disease: This type is characterized by episodes of worsening followed by periods of recovery. Examples include migraine headaches, asthma, and appendicitis.
5. Catastrophic disease: In this type, the disease progresses rapidly and unpredictably, with a poor prognosis. Examples include cancer, AIDS, and organ failure.

Disease progression can be influenced by various factors, including:

1. Genetics: Some diseases are inherited and may have a predetermined course of progression.
2. Lifestyle: Factors such as smoking, lack of exercise, and poor diet can contribute to disease progression.
3. Environmental factors: Exposure to toxins, allergens, and other environmental stressors can influence disease progression.
4. Medical treatment: The effectiveness of medical treatment can impact disease progression, either by slowing or halting the disease process or by causing unintended side effects.
5. Co-morbidities: The presence of multiple diseases or conditions can interact and affect each other's progression.

Understanding the type and factors influencing disease progression is essential for developing effective treatment plans and improving patient outcomes.

VPCs can cause symptoms such as palpitations, shortness of breath, and dizziness. In some cases, they can lead to more serious arrhythmias and even sudden cardiac death. To diagnose VPCs, a healthcare provider may perform an electrocardiogram (ECG) or other tests to measure the heart's electrical activity. Treatment options for VPCs include medications to regulate the heart rhythm, implantable devices such as pacemakers or defibrillators, and in some cases, surgery to repair or replace a damaged heart valve.

Prevention of VPCs includes maintaining a healthy lifestyle, managing high blood pressure and other risk factors, and avoiding certain medications that can trigger these abnormal heartbeats. Early detection and treatment of underlying heart conditions can also help prevent VPCs from occurring. In summary, Ventricular Premature Complexes are abnormal heartbeats that can disrupt the normal heart rhythm and may be a sign of an underlying heart condition. Diagnosis and treatment options are available to manage this condition and prevent complications.

1. Ischemic stroke: This is the most common type of stroke, accounting for about 87% of all strokes. It occurs when a blood vessel in the brain becomes blocked, reducing blood flow to the brain.
2. Hemorrhagic stroke: This type of stroke occurs when a blood vessel in the brain ruptures, causing bleeding in the brain. High blood pressure, aneurysms, and blood vessel malformations can all cause hemorrhagic strokes.
3. Transient ischemic attack (TIA): Also known as a "mini-stroke," a TIA is a temporary interruption of blood flow to the brain that lasts for a short period of time, usually less than 24 hours. TIAs are often a warning sign for a future stroke and should be taken seriously.

Stroke can cause a wide range of symptoms depending on the location and severity of the damage to the brain. Some common symptoms include:

* Weakness or numbness in the face, arm, or leg
* Difficulty speaking or understanding speech
* Sudden vision loss or double vision
* Dizziness, loss of balance, or sudden falls
* Severe headache
* Confusion, disorientation, or difficulty with memory

Stroke is a leading cause of long-term disability and can have a significant impact on the quality of life for survivors. However, with prompt medical treatment and rehabilitation, many people are able to recover some or all of their lost functions and lead active lives.

The medical community has made significant progress in understanding stroke and developing effective treatments. Some of the most important advances include:

* Development of clot-busting drugs and mechanical thrombectomy devices to treat ischemic strokes
* Improved imaging techniques, such as CT and MRI scans, to diagnose stroke and determine its cause
* Advances in surgical techniques for hemorrhagic stroke
* Development of new medications to prevent blood clots and reduce the risk of stroke

Despite these advances, stroke remains a significant public health problem. According to the American Heart Association, stroke is the fifth leading cause of death in the United States and the leading cause of long-term disability. In 2017, there were over 795,000 strokes in the United States alone.

There are several risk factors for stroke that can be controlled or modified. These include:

* High blood pressure
* Diabetes mellitus
* High cholesterol levels
* Smoking
* Obesity
* Lack of physical activity
* Poor diet

In addition to these modifiable risk factors, there are also several non-modifiable risk factors for stroke, such as age (stroke risk increases with age), family history of stroke, and previous stroke or transient ischemic attack (TIA).

The medical community has made significant progress in understanding the causes and risk factors for stroke, as well as developing effective treatments and prevention strategies. However, more research is needed to improve outcomes for stroke survivors and reduce the overall burden of this disease.

1. Heart Disease: High blood sugar levels can damage the blood vessels and increase the risk of heart disease, which includes conditions like heart attacks, strokes, and peripheral artery disease.
2. Kidney Damage: Uncontrolled diabetes can damage the kidneys over time, leading to chronic kidney disease and potentially even kidney failure.
3. Nerve Damage: High blood sugar levels can damage the nerves in the body, causing numbness, tingling, and pain in the hands and feet. This is known as diabetic neuropathy.
4. Eye Problems: Diabetes can cause changes in the blood vessels of the eyes, leading to vision problems and even blindness. This is known as diabetic retinopathy.
5. Infections: People with diabetes are more prone to developing skin infections, urinary tract infections, and other types of infections due to their weakened immune system.
6. Amputations: Poor blood flow and nerve damage can lead to amputations of the feet or legs if left untreated.
7. Cognitive Decline: Diabetes has been linked to an increased risk of cognitive decline and dementia.
8. Sexual Dysfunction: Men with diabetes may experience erectile dysfunction, while women with diabetes may experience decreased sexual desire and vaginal dryness.
9. Gum Disease: People with diabetes are more prone to developing gum disease and other oral health problems due to their increased risk of infection.
10. Flu and Pneumonia: Diabetes can weaken the immune system, making it easier to catch the flu and pneumonia.

It is important for people with diabetes to manage their condition properly to prevent or delay these complications from occurring. This includes monitoring blood sugar levels regularly, taking medication as prescribed by a doctor, and following a healthy diet and exercise plan. Regular check-ups with a healthcare provider can also help identify any potential complications early on and prevent them from becoming more serious.

Synonyms: RV dysfunction

See also: Left Ventricular Dysfunction, Cardiac Dysfunction, Heart Failure

Note: This term is not a formal medical diagnosis but rather a descriptive term used to indicate the specific location of cardiac dysfunction. A more comprehensive diagnosis would require further evaluation and testing by a healthcare provider.

There are several causes of hypotension, including:

1. Dehydration: Loss of fluids and electrolytes can cause a drop in blood pressure.
2. Blood loss: Losing too much blood can lead to hypotension.
3. Medications: Certain medications, such as diuretics and beta-blockers, can lower blood pressure.
4. Heart conditions: Heart failure, cardiac tamponade, and arrhythmias can all cause hypotension.
5. Endocrine disorders: Hypothyroidism (underactive thyroid) and adrenal insufficiency can cause low blood pressure.
6. Vasodilation: A condition where the blood vessels are dilated, leading to low blood pressure.
7. Sepsis: Severe infection can cause hypotension.

Symptoms of hypotension can include:

1. Dizziness and lightheadedness
2. Fainting or passing out
3. Weakness and fatigue
4. Confusion and disorientation
5. Pale, cool, or clammy skin
6. Fast or weak pulse
7. Shortness of breath
8. Nausea and vomiting

If you suspect that you or someone else is experiencing hypotension, it is important to seek medical attention immediately. Treatment will depend on the underlying cause of the condition, but may include fluids, electrolytes, and medication to raise blood pressure. In severe cases, hospitalization may be necessary.

There are several types of premature complexes, including:

1. Premature atrial complex (PAC): An extra heartbeat that originates in the atria, usually due to a rapid or irregular heart rate.
2. Premature ventricular complex (PVC): An extra heartbeat that originates in the ventricles, which can be more serious than PACs and may require further evaluation.
3. Premature nodal rhythm: A condition where the AV node (the electrical pathway between the atria and ventricles) fires prematurely, causing a rapid heart rate.

PCCs can be diagnosed using electrocardiography (ECG), which records the electrical activity of the heart. Treatment options for PCCs depend on the underlying cause and may include medications to regulate the heart rhythm, cardioversion (a procedure that restores a normal heart rhythm using electrical shock), or catheter ablation (a minimally invasive procedure that destroys the abnormal electrical pathway).

Aortic valve stenosis can be caused by a variety of factors, including aging, calcium buildup, or congenital heart defects. It is typically diagnosed through echocardiography or cardiac catheterization. Treatment options for aortic valve stenosis include medications to manage symptoms, aortic valve replacement surgery, or transcatheter aortic valve replacement (TAVR), which is a minimally invasive procedure.

In TAVR, a thin tube is inserted through a blood vessel in the leg and guided to the heart, where it delivers a new aortic valve. This can be performed through a small incision in the chest or through a catheter inserted into the femoral artery.

While TAVR has become increasingly popular for treating aortic valve stenosis, it is not suitable for all patients and requires careful evaluation to determine the best course of treatment. It is important to discuss the risks and benefits of TAVR with a healthcare provider to determine the appropriate treatment plan for each individual patient.

1. Ventricular septal defect (VSD): an opening in the wall between the two lower chambers of the heart, which allows oxygen-poor blood to mix with oxygen-rich blood.
2. Pulmonary stenosis: a narrowing of the pulmonary valve and pulmonary artery, which restricts blood flow to the lungs.
3. Overriding aorta: an aorta that grows over the ventricular septal defect, blocking the flow of oxygen-rich blood from the left ventricle to the rest of the body.
4. Right ventricular hypertrophy: enlargement of the right ventricle due to increased pressure caused by the backflow of blood through the VSD.

These abnormalities combine to reduce the amount of oxygen that reaches the body's tissues, leading to cyanosis (blue discoloration of the skin) and fatigue. Tetralogy of Fallot is usually diagnosed at birth or soon after, and treatment typically involves a combination of medications, surgery, and other interventions to repair the defects and improve blood flow to the body.

In the medical field, dyspnea is often evaluated using a numerical rating scale called the Medical Research Council (MRC) dyspnea scale. This scale rates dyspnea on a scale of 0 to 5, with 0 indicating no shortness of breath and 5 indicating extreme shortness of breath.

Dyspnea can be a symptom of many different conditions, including:

1. Respiratory problems such as asthma, chronic obstructive pulmonary disease (COPD), and pneumonia.
2. Heart conditions such as heart failure and coronary artery disease.
3. Other underlying medical conditions such as anemia, lung disease, and liver failure.
4. Neurological conditions such as stroke and multiple sclerosis.
5. Psychological conditions such as anxiety and depression.

Assessment of dyspnea involves a thorough medical history and physical examination, including listening to the patient's lung sounds and assessing their oxygen saturation levels. Diagnostic tests such as chest X-rays, electrocardiograms (ECGs), and blood tests may also be ordered to determine the underlying cause of dyspnea.

Treatment of dyspnea depends on the underlying cause and may include medications, oxygen therapy, and other interventions such as pulmonary rehabilitation. In some cases, dyspnea may be a symptom of a life-threatening condition that requires immediate medical attention.

Key Features of Cardio-Renal Syndrome:

1. Cardiac dysfunction: CRS is characterized by impaired cardiac function, including decreased left ventricular ejection fraction, reduced cardiac output, and abnormal heart rhythms.
2. Renal dysfunction: The condition is associated with acute kidney injury (AKI) or chronic kidney disease (CKD), which can lead to fluid overload, electrolyte imbalance, and metabolic disturbances.
3. Vasoplegia: CRS is often accompanied by vasoplegia, a condition characterized by hypotension, low systemic vascular resistance, and impaired vasomotor tone.
4. Sepsis or shock: CRS frequently develops in patients with sepsis or shock, who have severe inflammation and organ dysfunction.
5. Multi-organ involvement: The syndrome can affect multiple organs, including the heart, kidneys, liver, and brain.

Pathophysiology of Cardio-Renal Syndrome:

The pathophysiology of CRS is complex and involves a series of interrelated events. Key mechanisms include:

1. Inflammation: Sepsis or shock triggers an inflammatory response, which can lead to cardiac and renal dysfunction.
2. Oxidative stress: Reactive oxygen species (ROS) can damage cardiac and renal tissues, contributing to the development of CRS.
3. Endothelial dysfunction: Impaired endothelial function can impair vasodilation and promote vasoconstriction, leading to hypertension or hypotension.
4. Neurohormonal activation: The hypothalamic-pituitary-adrenal (HPA) axis is activated, leading to the release of stress hormones such as cortisol and catecholamines.
5. Cardiac dysfunction: Sepsis-induced cardiomyopathy can lead to decreased cardiac output, impaired sodium-potassium pump function, and altered autonomic tone.
6. Renal dysfunction: Injury to the renal tissues can lead to decreased renal blood flow, increased proteinuria, and impaired urinary concentrating ability.

Diagnosis of Cardio-Renal Syndrome:

The diagnosis of CRS is based on a combination of clinical, laboratory, and imaging studies. Key diagnostic criteria include:

1. Clinical signs of hypotension or shock.
2. Laboratory evidence of inflammation (e.g., elevated white blood cell count, elevated serum creatinine).
3. Echocardiographic or other imaging studies demonstrating cardiac dysfunction.
4. Urinary output and sodium balance assessment to evaluate fluid status.
5. Measurement of plasma levels of natriuretic peptides (e.g., B-type natriuretic peptide, N-terminal pro-B-type natriuretic peptide) to assess cardiac function.
6. Assessment of renal function using serum creatinine and urinary protein levels.

Treatment of Cardio-Renal Syndrome:

The treatment of CRS is aimed at addressing the underlying causes of both cardiac and renal dysfunction. Key therapeutic strategies include:

1. Fluid management: Initiation of fluid resuscitation with crystalloids or colloids to restore blood volume and urine output, while avoiding excessive fluid administration that can exacerbate cardiac dysfunction and worsen renal impairment.
2. Vasoactive medications: Use of vasopressors to enhance systemic vascular resistance and improve cardiac function, while avoiding dopamine or other agents that can worsen renal function.
3. Diuretics: Administration of loop diuretics to promote urinary sodium and water excretion, which can help manage fluid overload and improve renal function.
4. Anti-inflammatory therapy: Use of corticosteroids or other anti-inflammatory agents to reduce inflammation and immune-mediated damage in the setting of acute kidney injury.
5. Nutritional support: Provision of adequate nutrition, including supplementation with essential vitamins and minerals, to promote recovery and minimize catabolism.
6. Monitoring and adjustment of medications: Regular monitoring of blood pressure, heart rate, and renal function, along with adjustments in medication dosages and types as needed to optimize therapeutic effects while avoiding adverse consequences.
7. Dialysis: Initiation of dialysis in cases of severe acute kidney injury or when other therapies are insufficient to maintain fluid-electrolyte balance and prevent complications.
8. Addressing underlying causes: Management of underlying conditions, such as sepsis, shock, or urinary obstruction, to help restore renal function and prevent recurrence of acute kidney injury.
9. Hemodialysis: Use of hemodialysis in cases of severe acute kidney injury or when other therapies are insufficient to maintain fluid-electrolyte balance and prevent complications.
10. Continuous renal replacement therapy (CRRT): Use of CRRT in cases of severe acute kidney injury or when other therapies are insufficient to maintain fluid-electrolyte balance and prevent complications.

It is important to note that the choice of therapy will depend on the underlying cause of acute kidney injury, the severity of the condition, and the patient's overall medical status and comorbidities.

Types of Experimental Diabetes Mellitus include:

1. Streptozotocin-induced diabetes: This type of EDM is caused by administration of streptozotocin, a chemical that damages the insulin-producing beta cells in the pancreas, leading to high blood sugar levels.
2. Alloxan-induced diabetes: This type of EDM is caused by administration of alloxan, a chemical that also damages the insulin-producing beta cells in the pancreas.
3. Pancreatectomy-induced diabetes: In this type of EDM, the pancreas is surgically removed or damaged, leading to loss of insulin production and high blood sugar levels.

Experimental Diabetes Mellitus has several applications in research, including:

1. Testing new drugs and therapies for diabetes treatment: EDM allows researchers to evaluate the effectiveness of new treatments on blood sugar control and other physiological processes.
2. Studying the pathophysiology of diabetes: By inducing EDM in animals, researchers can study the progression of diabetes and its effects on various organs and tissues.
3. Investigating the role of genetics in diabetes: Researchers can use EDM to study the effects of genetic mutations on diabetes development and progression.
4. Evaluating the efficacy of new diagnostic techniques: EDM allows researchers to test new methods for diagnosing diabetes and monitoring blood sugar levels.
5. Investigating the complications of diabetes: By inducing EDM in animals, researchers can study the development of complications such as retinopathy, nephropathy, and cardiovascular disease.

In conclusion, Experimental Diabetes Mellitus is a valuable tool for researchers studying diabetes and its complications. The technique allows for precise control over blood sugar levels and has numerous applications in testing new treatments, studying the pathophysiology of diabetes, investigating the role of genetics, evaluating new diagnostic techniques, and investigating complications.

Examples of fetal diseases include:

1. Down syndrome: A genetic disorder caused by an extra copy of chromosome 21, which can cause delays in physical and intellectual development, as well as increased risk of heart defects and other health problems.
2. Spina bifida: A birth defect that affects the development of the spine and brain, resulting in a range of symptoms from mild to severe.
3. Cystic fibrosis: A genetic disorder that affects the respiratory and digestive systems, causing thick mucus buildup and recurring lung infections.
4. Anencephaly: A condition where a portion of the brain and skull are missing, which is usually fatal within a few days or weeks of birth.
5. Clubfoot: A deformity of the foot and ankle that can be treated with casts or surgery.
6. Hirschsprung's disease: A condition where the nerve cells that control bowel movements are missing, leading to constipation and other symptoms.
7. Diaphragmatic hernia: A birth defect that occurs when there is a hole in the diaphragm, allowing organs from the abdomen to move into the chest cavity.
8. Gastroschisis: A birth defect where the intestines protrude through a opening in the abdominal wall.
9. Congenital heart disease: Heart defects that are present at birth, such as holes in the heart or narrowed blood vessels.
10. Neural tube defects: Defects that affect the brain and spine, such as spina bifida and anencephaly.

Early detection and diagnosis of fetal diseases can be crucial for ensuring proper medical care and improving outcomes for affected babies. Prenatal testing, such as ultrasound and blood tests, can help identify fetal anomalies and genetic disorders during pregnancy.

There are several different types of obesity, including:

1. Central obesity: This type of obesity is characterized by excess fat around the waistline, which can increase the risk of health problems such as type 2 diabetes and cardiovascular disease.
2. Peripheral obesity: This type of obesity is characterized by excess fat in the hips, thighs, and arms.
3. Visceral obesity: This type of obesity is characterized by excess fat around the internal organs in the abdominal cavity.
4. Mixed obesity: This type of obesity is characterized by both central and peripheral obesity.

Obesity can be caused by a variety of factors, including genetics, lack of physical activity, poor diet, sleep deprivation, and certain medications. Treatment for obesity typically involves a combination of lifestyle changes, such as increased physical activity and a healthy diet, and in some cases, medication or surgery may be necessary to achieve weight loss.

Preventing obesity is important for overall health and well-being, and can be achieved through a variety of strategies, including:

1. Eating a healthy, balanced diet that is low in added sugars, saturated fats, and refined carbohydrates.
2. Engaging in regular physical activity, such as walking, jogging, or swimming.
3. Getting enough sleep each night.
4. Managing stress levels through relaxation techniques, such as meditation or deep breathing.
5. Avoiding excessive alcohol consumption and quitting smoking.
6. Monitoring weight and body mass index (BMI) on a regular basis to identify any changes or potential health risks.
7. Seeking professional help from a healthcare provider or registered dietitian for personalized guidance on weight management and healthy lifestyle choices.

Some common types of cardiovascular abnormalities include:

1. Hypertension (high blood pressure): This occurs when the force of blood pushing against the artery walls is too high, which can damage the blood vessels and increase the risk of heart disease.
2. Hyperlipidemia (high cholesterol): Elevated levels of low-density lipoprotein (LDL) cholesterol and triglycerides in the blood can contribute to the buildup of plaque in the arteries, leading to blockages and increasing the risk of heart disease.
3. Heart valve problems: Dysfunctional heart valves can disrupt the normal flow of blood, causing symptoms such as fatigue, shortness of breath, and swelling in the legs.
4. Cardiac arrhythmias (abnormal heart rhythms): These can include atrial fibrillation, ventricular tachycardia, and ventricular fibrillation, which can lead to irregular heartbeats and potentially life-threatening complications.
5. Heart failure: This occurs when the heart is unable to pump enough blood to meet the body's needs, leading to fatigue, swelling in the legs, and shortness of breath.
6. Coronary artery disease: The buildup of plaque in the coronary arteries can reduce blood flow to the heart muscle, leading to chest pain or a heart attack.
7. Heart murmurs: These are abnormal sounds heard during a heartbeat that can indicate underlying cardiovascular problems, such as congenital heart defects or heart valve problems.
8. Anemia: This is a condition in which the body does not have enough red blood cells or hemoglobin, which can lead to fatigue, weakness, and shortness of breath.
9. Peripheral artery disease: The narrowing of the blood vessels that supply oxygen and nutrients to the legs, which can cause leg pain when walking (claudication) or numbness in the legs.
10. Venous thromboembolism (VTE): This is a condition in which a blood clot forms in the veins, which can be dangerous and even life-threatening if it breaks loose and travels to the lungs.

It's important to note that this list is not exhaustive and there may be other cardiovascular conditions that are not included here. If you suspect you or someone else is experiencing a cardiovascular problem, it's important to seek medical attention immediately.

Reperfusion injury can cause inflammation, cell death, and impaired function in the affected tissue or organ. The severity of reperfusion injury can vary depending on the duration and severity of the initial ischemic event, as well as the promptness and effectiveness of treatment to restore blood flow.

Reperfusion injury can be a complicating factor in various medical conditions, including:

1. Myocardial infarction (heart attack): Reperfusion injury can occur when blood flow is restored to the heart muscle after a heart attack, leading to inflammation and cell death.
2. Stroke: Reperfusion injury can occur when blood flow is restored to the brain after an ischemic stroke, leading to inflammation and damage to brain tissue.
3. Organ transplantation: Reperfusion injury can occur when a transplanted organ is subjected to ischemia during harvesting or preservation, and then reperfused with blood.
4. Peripheral arterial disease: Reperfusion injury can occur when blood flow is restored to a previously occluded peripheral artery, leading to inflammation and damage to the affected tissue.

Treatment of reperfusion injury often involves medications to reduce inflammation and oxidative stress, as well as supportive care to manage symptoms and prevent further complications. In some cases, experimental therapies such as stem cell transplantation or gene therapy may be used to promote tissue repair and regeneration.

Type 2 diabetes can be managed through a combination of diet, exercise, and medication. In some cases, lifestyle changes may be enough to control blood sugar levels, while in other cases, medication or insulin therapy may be necessary. Regular monitoring of blood sugar levels and follow-up with a healthcare provider are important for managing the condition and preventing complications.

Common symptoms of type 2 diabetes include:

* Increased thirst and urination
* Fatigue
* Blurred vision
* Cuts or bruises that are slow to heal
* Tingling or numbness in the hands and feet
* Recurring skin, gum, or bladder infections

If left untreated, type 2 diabetes can lead to a range of complications, including:

* Heart disease and stroke
* Kidney damage and failure
* Nerve damage and pain
* Eye damage and blindness
* Foot damage and amputation

The exact cause of type 2 diabetes is not known, but it is believed to be linked to a combination of genetic and lifestyle factors, such as:

* Obesity and excess body weight
* Lack of physical activity
* Poor diet and nutrition
* Age and family history
* Certain ethnicities (e.g., African American, Hispanic/Latino, Native American)
* History of gestational diabetes or delivering a baby over 9 lbs.

There is no cure for type 2 diabetes, but it can be managed and controlled through a combination of lifestyle changes and medication. With proper treatment and self-care, people with type 2 diabetes can lead long, healthy lives.

Examples of syndromes include:

1. Down syndrome: A genetic disorder caused by an extra copy of chromosome 21 that affects intellectual and physical development.
2. Turner syndrome: A genetic disorder caused by a missing or partially deleted X chromosome that affects physical growth and development in females.
3. Marfan syndrome: A genetic disorder affecting the body's connective tissue, causing tall stature, long limbs, and cardiovascular problems.
4. Alzheimer's disease: A neurodegenerative disorder characterized by memory loss, confusion, and changes in personality and behavior.
5. Parkinson's disease: A neurological disorder characterized by tremors, rigidity, and difficulty with movement.
6. Klinefelter syndrome: A genetic disorder caused by an extra X chromosome in males, leading to infertility and other physical characteristics.
7. Williams syndrome: A rare genetic disorder caused by a deletion of genetic material on chromosome 7, characterized by cardiovascular problems, developmental delays, and a distinctive facial appearance.
8. Fragile X syndrome: The most common form of inherited intellectual disability, caused by an expansion of a specific gene on the X chromosome.
9. Prader-Willi syndrome: A genetic disorder caused by a defect in the hypothalamus, leading to problems with appetite regulation and obesity.
10. Sjogren's syndrome: An autoimmune disorder that affects the glands that produce tears and saliva, causing dry eyes and mouth.

Syndromes can be diagnosed through a combination of physical examination, medical history, laboratory tests, and imaging studies. Treatment for a syndrome depends on the underlying cause and the specific symptoms and signs presented by the patient.

The QT interval is a measure of the time it takes for the ventricles to recover from each heartbeat and prepare for the next one. In people with LQTS, this recovery time is prolonged, which can disrupt the normal rhythm of the heart and increase the risk of arrhythmias.

LQTS is caused by mutations in genes that encode proteins involved in the cardiac ion channels, which regulate the flow of ions into and out of the heart muscle cells. These mutations can affect the normal functioning of the ion channels, leading to abnormalities in the electrical activity of the heart.

Symptoms of LQTS can include palpitations, fainting spells, and seizures. In some cases, LQTS can be diagnosed based on a family history of the condition or after a sudden death in an otherwise healthy individual. Other tests, such as an electrocardiogram (ECG), echocardiogram, and stress test, may also be used to confirm the diagnosis.

Treatment for LQTS typically involves medications that regulate the heart's rhythm and reduce the risk of arrhythmias. In some cases, an implantable cardioverter-defibrillator (ICD) may be recommended to monitor the heart's activity and deliver an electric shock if a potentially life-threatening arrhythmia is detected. Lifestyle modifications, such as avoiding stimuli that trigger symptoms and taking precautions during exercise and stress, may also be recommended.

In summary, Long QT syndrome is a rare inherited disorder that affects the electrical activity of the heart, leading to an abnormal prolongation of the QT interval and an increased risk of irregular and potentially life-threatening heart rhythms. It is important for individuals with LQTS to be closely monitored by a healthcare provider and to take precautions to manage their condition and reduce the risk of complications.

There are several types of hypertrophy, including:

1. Muscle hypertrophy: The enlargement of muscle fibers due to increased protein synthesis and cell growth, often seen in individuals who engage in resistance training exercises.
2. Cardiac hypertrophy: The enlargement of the heart due to an increase in cardiac workload, often seen in individuals with high blood pressure or other cardiovascular conditions.
3. Adipose tissue hypertrophy: The excessive growth of fat cells, often seen in individuals who are obese or have insulin resistance.
4. Neurological hypertrophy: The enlargement of neural structures such as brain or spinal cord due to an increase in the number of neurons or glial cells, often seen in individuals with neurodegenerative diseases such as Alzheimer's or Parkinson's.
5. Hepatic hypertrophy: The enlargement of the liver due to an increase in the number of liver cells, often seen in individuals with liver disease or cirrhosis.
6. Renal hypertrophy: The enlargement of the kidneys due to an increase in blood flow and filtration, often seen in individuals with kidney disease or hypertension.
7. Ovarian hypertrophy: The enlargement of the ovaries due to an increase in the number of follicles or hormonal imbalances, often seen in individuals with polycystic ovary syndrome (PCOS).

Hypertrophy can be diagnosed through various medical tests such as imaging studies (e.g., CT scans, MRI), biopsies, and blood tests. Treatment options for hypertrophy depend on the underlying cause and may include medications, lifestyle changes, and surgery.

In conclusion, hypertrophy is a growth or enlargement of cells, tissues, or organs in response to an excessive stimulus. It can occur in various parts of the body, including the brain, liver, kidneys, heart, muscles, and ovaries. Understanding the underlying causes and diagnosis of hypertrophy is crucial for effective treatment and management of related health conditions.

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1999 Heart Strings (Linda Lewis album), 1974 Heart Strings (Bonnie Tyler album), 2003 Heart Strings (Moya Brennan album), 2008 ... Heartstrings or Heart Strings may refer to: The chordae tendineae Heart Strings (1917 film), an American drama film directed by ... This disambiguation page lists articles associated with the title Heart Strings. If an internal link led you here, you may wish ... "Heartstrings" (Janet Leon song), 2013 "Heart Strings" by Oh Wonder from Ultralife, 2017 "Heartstrings" by Leighton Meester from ...
Bohn, now Brennan Heart, continued producing hardstyle music after the split. In 2006, Brennan Heart joined the Dutch label ... After more than three years of cooperation, the duo split and went their own ways, with Bohn taking the name Brennan Heart and ... The year 2021 was a year to celebrate 20 years in the business with his seventh album Brennan Heart 20 Yrs containing 4 CDs of ... In 2012, he left Scantraxx Records and established his own music label Brennan Heart Music. He rebranded his own label as WE R ...
A hand heart (🫶) is a gesture in which a person forms a heart shape using their fingers. The upside down hand heart gesture was ... Google patents the heart hand-gesture to let you 'like' things with Glass "Google Patented the 'Heart' Gesture and Other Fun ... Heart in Hand Finger heart Cué, Elena (2015-01-30). "A Conversation With Maurizio Cattelan". Huffington Post. Retrieved 2019-01 ... Google filed a patent in July 2011 that allowed Google Glass users to use the hand heart in front of any objects, and the ...
... based on Triangle Heart and Triangle Heart 2, and Lyrical Toy Box, based on Triangle Heart 3. The three main games and the two ... The 2003 Triangle Heart: Sweet Songs Forever (とらいあんぐるハート~Sweet Songs Forever~) OVA, based on the game Triangle Heart 3, focuses ... The 2000 - 2002 Triangle Heart: Sazanami Joshiryō (とらいあんぐるハート さざなみ女子寮) adult OVA, based on the game Triangle Heart 2, focuses ... Janis Triangle Heart: 1, 2, 3, 3 Lyrical omocha box, Love love omocha box, 1.2.3 DVD
"Heart Healer" is a song written by John Greenebaum and Tomas Gmeiner, and recorded by American country music artist Mel Tillis ... "Heart Healer lyrics chords , Mel Tillis". Whitburn, Joel (2004). The Billboard Book Of Top 40 Country Hits: 1944-2006, Second ... It was released in December 1976 as the first single and title track from the album Heart Healer. The song was Tillis' third ...
... at IMDb v t e v t e v t e (CS1 Spanish-language sources (es), CS1 European Spanish-language sources (es-es), ... Moon Heart (Spanish: El corazón de la luna) is a 2021 Peruvian sci-fi drama film directed by Aldo Salvini and starring Haydeé ...
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... at IMDb Dear Heart at AllMovie Dear Heart at the TCM Movie Database Dear Heart at the American Film Institute ... Dear Heart is a 1964 American romantic-comedy film starring Glenn Ford and Geraldine Page as lonely middle-aged people who fall ... Dear Heart holds a 33% rating on Rotten Tomatoes based on 6 reviews. List of American films of 1964 Ford, p. 319. Crowther, ... "Screen: 'Dear Heart' Is at Music Hall." New York Times. March 8, 1965. Perry, Eleanor. "Marty's Spoiled Rich Sister." Life. ...
The song was featured in the 2009 videogame Colin McRae: Dirt 2. CD "Radio Heart" "Charity Shop" 7" #1 "Radio Heart" "Invasion ... 7" #2 "Radio Heart" "Radio Heart (Live)" v t e (Articles lacking sources from May 2016, All articles lacking sources, Use dmy ... "Radio Heart" is the second single from The Futureheads' third album This Is Not the World. It was released on 19 May 2008 in ...
"Heart Shaker" The chorus of "Heart Shaker" shows diverse voices of Nayeon, Tzuyu, Sana and Momo. Problems playing this file? ... JYP Entertainment first teased "Heart Shaker" in the music video for "Likey". The words "Heart Shaker" were written on a street ... Ji, Min-kyung (December 11, 2021). "트와이스, 'Heart Shaker' MV 4억 뷰 돌파..통산 7번째 [공식]" [TWICE, 'Heart Shaker' MV surpasses 400 ... "美 언론 "트와이스 'Heart Shaker', 완벽한 팝 탄생..화려+발랄" 극찬". Naver (in Korean). Osen. Archived from the original on December 23, 2017. ...
96.1 Heart Colchester Global Radio The One Network Global Radio to halve number of local Heart stations, mediaguardian.co.uk, ... On 21 June 2010, Global Radio announced plans to close Heart Ipswich and merge the station with Heart Norwich as part of plans ... Heart Ipswich (formerly SGR FM) was a radio station that evolved from Suffolk Group Radio, which was the parent company for two ... On 5 January 2009, SGR FM was renamed as Heart, as part of a major re-brand involving 29 One Network stations. By that time, ...
The Purple Heart award is a heart-shaped medal within a gold border, 1+3⁄8 inches (35 mm) wide, containing a profile of General ... The National Purple Heart Hall of Honor is located in New Windsor, New York. The original Purple Heart, designated as the Badge ... The Purple Heart is not awarded for non-combat injuries. Enemy-related injuries which justify the award of the Purple Heart ... With its forerunner, the Badge of Military Merit, which took the form of a heart made of purple cloth, the Purple Heart is the ...
"Glass Heart by Mel Parsons". iTunes NZ. 30 November 2018. Retrieved 22 April 2019. "Glass Heart by Mel Parsons". Bandcamp. ... "Mel Parsons: Glass Heart". NZ Musician. Retrieved 23 April 2019. Reid, Graham (3 December 2018). "Mel Parsons: Glass Heart ( ... Glass Heart is Mel Parsons' fourth album, released on 30 November 2018 on Cape Road Recordings. The concept of the album name ... Glass Heart is the first album Parsons recorded outside of New Zealand, in Santa Monica, California, USA. The recording ...
"Heart Live In Atlantic City Chart History - Independent Albums". Billboard. February 9, 2019. Retrieved June 20, 2020. "Heart ... "Heart Chart History -- US Rock 2-2-2013". Billboard.biz. Retrieved 9 May 2018. Wilkening, Matthew (December 27, 2012). "Heart's ... Their second full-length album was later re-released presented by Heart. Kohn, David (2003-07-15). "Taking Heart in New Surgery ... "British certifications - Heart". British Phonographic Industry. Retrieved September 25, 2022. Type Heart in the "Search BPI ...
... is a Spanish heavy metal/hard rock band from Madrid, Spain, founded in 2009. Leather Heart was founded in 2009 in ... "Crítica de LEATHER HEART - Comeback -". 2015-11-20. "Crítica de "Comeback" de LEATHER HEART -". "Top 110 Albumes Españoles 2015 ... "Leather Heart - Comeback". Discogs. "The Fish Factory - LEATHER HEART". Thefishfactory.es. 2011-04-19. Retrieved 2016-01-08. " ... "Participa en el Crowdfunding "Leather Heart - Grabación de nuestro primer disco" en Verkami". "Leather Heart - Encyclopaedia ...
... (Chinese: 男子的心) is a British-Malaysian tragedy silent film about the overseas Chinese community in the tin mining ... Silent film "Man's Heart (男子的心)" on YouTube Singapore Chinese newspaper "Lat Pau (叻報)", 29 November, Thursday, page 7 (第七頁): ...
... may refer to: Heart North West in Kendal, Cumbria Hope 103.2 in New South Wales This disambiguation page lists ... articles associated with the title HEART 103.2. If an internal link led you here, you may wish to change the link to point ...
Heart plans to have a proof-of-concept aircraft in 2024 and start flight tests in 2026. The Garmin G3000 avionics suite will be ... In March 2021, Heart signed a letter of intent with Finnair which would allow the airline to purchase up to 20 ES-19 aircraft. ... Heart Aerospace also has letters of intent from Braathens Regional Airlines, Icelandair and SAS for a total of 96 aircraft, and ... Heart Aerospace is a Swedish startup company developing electric aircraft. The company is developing the ES-30, a hybrid- ...
... "black heart" Black Heart (Eric Van Lustbader novel) Black Heart (Holly Black novel), a 2011 book by Holly Black Black Heart ( ... a 2020 album Black Heart (Stooshe song), 2012 Black Heart (Stone Temple Pilots song), 2013 "Black Heart", a song from the ... All pages with titles containing Black Heart This disambiguation page lists articles associated with the title Black Heart. If ... Black Heart may refer to: Uranothauma nubifer, an African butterfly also known as " ...
... may refer to: Heart's Delight, Swale, a settlement in Kent, England Heart's Delight, City of Canterbury, a ... settlement in Kent, England Heart's Delight-Islington, a town in Newfoundland and Labrador, Canada This disambiguation page ...
"Chrysalis Heart (Ido Remix)" - 5:16 "Chrysalis Heart (Sleepthief Remix)" - 4:14 "Chrysalis Heart (Original Mix)" - 3:49 " ... "Chrysalis Heart (Stereojackers vs Mark Loverush Edit)" - 3:27 "Chrysalis Heart (Stereojackers vs Mark Loverush Dub)" - 7:32 " ... "Chrysalis Heart" is the third single from Delerium's album Music Box Opera featuring Stef Lang. Remixes were made by ... Digital Release - 2013 "Chrysalis Heart (Stereojackers vs Mark Loverush Remix)" - 7:32 " ...
Learn about the causes of valvular heart disease. ... Valvular heart disease is when any valve in the heart has ... Other types of heart disease: *Heart failure. Heart failure happens when the heart cannot pump enough blood and oxygen to ... What is valvular heart disease?. Valvular heart disease is when any valve in the heart has damage or is diseased. There are ... Facts About Valvular Heart Disease. *About 2.5% of the U.S. population has valvular heart disease, but it is more common in ...
Heart-Brain Flame Ignites. The planetary heart-brain complex is ignited from within the core of the earth, as well as the ... This heart-brain complex is a part of the planetary nervous system or grid network, and the nerve cells of the planetary body ... The original astral heart complex of earth is the fourth dimensional green spectrum of light, and the brain or logos of the ... The heart-brain complex is an intelligence structure that can best be defined as the original and organic, design and function ...
Purple Heart (plural Purple Hearts) *(chiefly US, military) A US military decoration awarded in the name of the President of ... Retrieved from "https://en.wiktionary.org/w/index.php?title=Purple_Heart&oldid=54382855" ...
Find out how to protect your heart health with lifestyle changes that can also help you manage diabetes. ... Heart failure is a serious condition, but it doesnt mean the heart has stopped beating; it means your heart cant pump blood ... What Is Heart Disease?. Heart disease includes several kinds of problems that affect your heart. The term "cardiovascular ... Diabetes and heart disease often go hand in hand. Learn how to protect your heart with simple lifestyle changes that can also ...
Fundraise or donate to Carly Heart Trust with JustGiving, the worlds leading online fundraising platform, helping charities to ... About Carly Heart Trust. Thank you for visiting Carly Heart Trust, after an incredibly frightening moment in our lives, we have ... Carly Heart Trust. We raise cash for First Aid & defibrillator to improve survival during cardiac arrest. ... Im Raising money by Raising Awareness in Heart Health for Coral Levett because access to life saving equipment should be for ...
A young woman is forced to marry an old greedy man to save her father from bankruptcy although she has promised her heart to ... Heart of Stone: Directed by Charles Binamé. With Pierre Lebeau, Karine Vanasse, Roy Dupuis, Rémy Girard. ... She has the power to take your heart and tear it. Im a guy, it is a huge accomplishment. hehe When I left the teather, I felt ... A young woman is forced to marry an old greedy man to save her father from bankruptcy although she has promised her heart to ...
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Truth Heart. by GDJ - uploaded on March 22, 2019, 7:28 pm ... Reality Ultimate Fundamental Absolute Abstract Art Heart Love ...
Heart Failure Center of Excellence includes the latest research, journal articles, Medscape TV, cases, quizzes, and peer ... discussion of heart failure, in collaboration with the American College of Cardiology. ...
Symptoms of heart valve diseases depend on the problem and the valve affected. Learn more about symptoms - from mild to severe ... Symptoms of heart valve diseases that occur with older age may happen slowly. Many people mistake early signs of heart valve ... Your doctor can do a test to look at your heart, called an echocardiogram, to diagnose a heart valve problem. ... Some symptoms are related to heart failure, which can be caused by problems with the heart valves. ...
Heart of Eir: The RPG that youve been waiting for. A narrative rich experience coupled with nostalgic mechanics, refined with ... Twilight Star: Heart of Eir on Facebook dragonclaw_studios on Twitch Twilight Star on Twitter DragonClaw Studios on YouTube ... Title: TwilightStar: Heart of Eir. Genre: Action, Adventure, Casual, Indie, RPG, Strategy. Developer: DragonClaw Studios, LLC. ... Heart of Eir does NOT require the need to sign up for a DragonClaw Studios Account. Steam makes us put that there. The account ...
Learn more about heart rate monitoring watches for running and heart health here. ... We review 8 of the best heart rate monitoring watches for quality, accuracy, and extra features. ... What is a heart rate monitor?. A heart rate monitor measures a persons heart rate in real-time and records the data for the ... American Heart Association. states that the target resting heart rate by age is as follows: Age. Target resting heart rate (bpm ...
Consecration to the Immaculate Heart This section concerns the meaning of Consecration to the Immaculate Heart, the requests ...
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books A Budapest Full of Magic and Horror Comes to Life in This Exclusive Excerpt from This Rebel Heart By Lacy Baugher Milas ... music Dust Star Give Power-Pop a Serrated Edge on Open Up That Heart By Ben Salmon August 5, 2022 , 11:00am ... music Yumi Zouma Share Video for "My Palms Are Your Reference To Hold Your Heart" By Paris Rosenthal September 9, 2020 , 11: ... music Just Mustard Break Noise-Rock Ground on Heart Under By Max Freedman May 25, 2022 , 10:11am ...
... and management strategies for those living with it who want to prioritize heart health. ... Heart disease (cardiovascular disease) is a leading cause of death worldwide. Explore the types and causes, as well as ... Heart disease symptoms in women may differ from men. Use a heart disease risk calculator to determine your heart attack risk. ... Although heart catheterization is the gold standard to define the anatomy of the heart and to confirm heart disease diagnosis ( ...
The Blue Heart Campaign raises awareness around the globe on human trafficking and its impact on people and society. The Blue ... in the framework of the Blue Heart Campaign. The application deadline is May 20 th. ... Heart Campaign encourages involvement of governments, civil society, the corporate sector and individuals alike to inspire ...
Dynamic heart model mimics hemodynamic loads, advances engineered heart tissue technology Peer-Reviewed Publication College of ... Dynamic heart model mimics hemodynamic loads, advances engineered heart tissue technology. College of Engineering, Carnegie ... Life sciences/Organismal biology/Anatomy/Circulatory system/Heart/Heart muscle * /Life sciences/Organismal biology/Anatomy/ ... However, using cells from patients with certain types of heart disease, these same exercise-like loads can result in heart ...
TCE exposure for a short period of time, at a very high concentration, can cause your heart to beat abnormally during the ... Low level exposure to TCE during the first two months of pregnancy may impact the formation of your developing babys heart ...
Malinskis team found that vitamin D3 has a restorative effect on the cardiovascular system, reducing the risk of heart attack ...
Description of the narrator or Joseph Conrad attitude toward Heart of Darkness. ... Heart of Darkness SparkNotes Literature Guide PRINT EDITION Ace your assignments with our guide to Heart of Darkness! ... The question of tone is notoriously tricky in Heart of Darkness, particularly because of Conrads use of a frame story. It is ... Central Idea Essay: Why Is Nature So Ominous in Heart of Darkness? ...
"One Heart Of Stars" by Loveshadow. 2011 - Licensed under. Creative Commons. Attribution Noncommercial (3.0). Click here for how ... What a lovely line: One Heart of Stars that Move!. I could have tinkered with this for ever, I had guitar lines, counter ... "One Heart Of Stars". One Heart Of Stars table#upload_page_table td { vertical-align: top; } td#upload_menu_box { width: 20 ...
Heart attack: The death of heart muscle due to the loss of blood supply. The loss of blood supply is usually caused by a ... Death of the heart muscle, in turn, causes chest pain and electrical instability of the heart muscle tissue. The electrical ... A heart attack is also called a myocardial infarction or an MI. Myocardial refers to the myocardium, the heart muscle. ... Patients suffering a heart attack are usually hospitalized for several days to detect heart rhythm disturbance, and observe for ...
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Copyright © 2023 BMJ Publishing Group Ltd & British Cardiovascular Society. All rights reserved.. ...
"Koran by Heart," although youd have to be hard-hearted indeed not to develop a rooting interest (Team Rifdha!) or a ... Tribeca: "Koran by Heart" -- Islamic slapdown!. Fundamentalist Islam meets "American Idol" in an enthralling new documentary ... Heres the only thing I need to say about Greg Barkers documentary "Koran by Heart," which premiered this past weekend at the ... And heres the second thing about "Koran by Heart": Its a colorful and dramatic saga of human competition, with a fascinating ...
... By Steve Serby Social Links for Steve Serby * View Author Archive ... I mean, theyve got talent, but I dont know if they necessarily have the heart. You get down, can you come back? Do you have ... And when it was over, after Lawrence Taylor had walked out on the 2009 Giants, Hall of Famer Harry Carson questioned the heart ... We didnt play well, obviously, but … heart and quit. … a question of that, thatll never be an issue with these Giants, I ...
You can use the ECG app on your Apple Watch to monitor your heart rate and detect irregularities, in which case you should ... Low or high heart rate. If your ECG reading is low or high heart rate then your watch has measured a heartbeat out of its range ... It is common to experience a low heart rate when sleeping, or as an extreme athlete, and a high heart rate can be attributed to ... How to use the ECG app on your Apple Watch to monitor your heart health. Written by Sarah Wells ...
Beer drinking protects against heart disease BMJ 2000; 320 :e doi:10.1136/bmj.320.7246.0/e ... Beer drinking protects against heart disease. BMJ 2000; 320 doi: https://doi.org/10.1136/bmj.320.7246.0/e (Published 20 May ...
  • The most common type is coronary artery disease , which affects blood flow to the heart. (cdc.gov)
  • Coronary artery disease is caused by the buildup of plaque in the walls of the coronary arteries, the blood vessels that supply oxygen and blood to the heart. (cdc.gov)
  • The loss of blood supply is usually caused by a complete blockage of a coronary artery , one of the arteries that supplies blood to the heart muscle . (rxlist.com)
  • Early reopening of a blocked coronary artery reduces the amount of heart muscle damage, lessens the size of the heart attack, and improves prognosis . (rxlist.com)
  • Coronary artery disease (CAD) - when a sticky substance called plaque narrows or blocks the arteries that supply blood to your heart muscle. (medlineplus.gov)
  • This is called a coronary artery bypass graft (CABG) , or heart bypass. (medlineplus.gov)
  • Surgeons may use off-pump heart surgery to do coronary artery bypass grafts (CABG), but only in certain cases. (medlineplus.gov)
  • Cardiac catheterization and coronary angiography have been shown to provide a useful role in patients who have CHF, valvular or congenital heart disease, and other cardiac conditions. (medscape.com)
  • The preva- past 3 decades in Pakistan the incidence of lence of hypertension was 16.3% in men coronary heart disease (CHD) has in- and 20.4% in women in the rural communi- creased [ 2-15 ]. (who.int)
  • In the United States, the most common type of heart disease is coronary artery disease (CAD, or ischemic heart disease), which can lead to heart attack. (cdc.gov)
  • This data can be used to identify trends in the mortality of heart disease (heart attack, coronary heart disease). (cdc.gov)
  • These indicators include data on the crude and age-adjusted rate of coronary heart disease and the prevalence of adults ever diagnosed with stroke. (cdc.gov)
  • Some cardiovascular diseases include coronary artery disease (where the arteries to the heart are blocked or narrowed), congestive heart failure (where the heart doesn't pump as efficiently as it should), and heart rhythm problems. (medlineplus.gov)
  • Fast Five Quiz: Heart Failure Comorbidities - Medscape - Dec 09, 2022. (medscape.com)
  • In March 2022, a 61-year-old woman in France who had received a heart-lung transplant sought treatment with chronic hepatitis mainly characterized by increased liver enzymes. (cdc.gov)
  • Valvular heart disease is when any valve in the heart has damage or is diseased. (cdc.gov)
  • About 2.5% of the U.S. population has valvular heart disease, but it is more common in older adults. (cdc.gov)
  • About 13% of people born before 1943 have valvular heart disease. (cdc.gov)
  • In 2017, there were 3,046 deaths due to rheumatic valvular heart disease and 24,811 deaths due to non-rheumatic valvular heart disease in the United States. (cdc.gov)
  • There are several causes of valvular heart disease, including congenital conditions (being born with it), infections, degenerative conditions (wearing out with age), and conditions linked to other types of heart disease. (cdc.gov)
  • MRI may identify congenital abnormalities and valvular heart disease. (medscape.com)
  • Congestive heart failure (CHF) is a clinical syndrome in which the heart fails to pump blood at the rate required by metabolizing tissues or in which the heart can do so only with an elevation in filling pressure. (medscape.com)
  • Looking to the future, the collaborators aim to use their model and findings to study a wide range of other heart diseases with genetic mutations, develop new therapeutic treatments and test drugs to gauge their effectiveness. (eurekalert.org)
  • Heart valve diseases - problems with the valves that control the flow of blood through your heart. (medlineplus.gov)
  • 22 ]. The overall prevalence of ischemic ble burden of high risk factors such as obe- heart diseases in men was 2.3% in the rural sity and hypercholesterolemia and mal- and 4.7% in the urban populations and cor- nutrition and hypocholesterolaemia [ 2 ]. (who.int)
  • Jagutpal, during his speech, highlighted the increasing number of people suffering from heart diseases with the ageing of the population and the NCD epidemic faced by the country since the past decades. (who.int)
  • According to the Health Minister, "more than 3000 deaths were due to heart diseases in 2019 while 19,500 patients were admitted in the different cardiology units of the regional hospitals for cardiac treatment. (who.int)
  • We need to reduce child obesity and prevent heart diseases", said Dr S. Gunness. (who.int)
  • Cardiovascular diseases affect the heart and blood vessels. (medlineplus.gov)
  • A heart rate monitor measures a person's heart rate in real-time and records the data for the user. (medicalnewstoday.com)
  • Optical monitors measure a person's heart rate by shining LED light through a person's skin and measuring the heart rate through a person's blood vessels. (medicalnewstoday.com)
  • According to the American Heart Association , an ECG "measures the electrical activity of the heartbeat" in order to detect whether a person's heart is beating at a healthy rhythm. (businessinsider.com)
  • Congenital heart valve disease is malformations of the heart valves, such as missing one of its leaflets. (cdc.gov)
  • Damaged and abnormal heart structures, including congenital heart defects - heart structure problems that you're born with. (medlineplus.gov)
  • If you have diabetes, you're twice as likely to have heart disease or a stroke than someone who doesn't have diabetes-and at a younger age. (cdc.gov)
  • The term "cardiovascular disease" is similar but includes all types of heart disease, stroke, and blood vessel disease. (cdc.gov)
  • These indicators provide information about health effects due to heart disease and stroke systems of care that informed policy interventions. (cdc.gov)
  • These indicators estimate the number and rate of people who were admitted to the hospital due to heart attack or stroke. (cdc.gov)
  • These data come from hospitals, the Centers for Medicare and Medicaid Services external icon , and CDC's Atlas of Heart Disease and Stroke . (cdc.gov)
  • These indicators used data collected by vital records from CDC's National Center for Health Statistics and CDC's Atlas of Heart Disease and Stroke . (cdc.gov)
  • Data can be used to identify trends and patterns in the mortality of ischemic heart disease, heart attacks, or stroke. (cdc.gov)
  • One way to understand your risk for a heart attack or stroke is to learn your "heart age. (cdc.gov)
  • Heart age is the age of your heart and blood vessels as a result of your risk factors for heart attack and stroke. (cdc.gov)
  • Even if you haven't had a heart attack or stroke, most US adults have a heart age older than their actual age placing them at greater risk of having one. (cdc.gov)
  • Though there are other ways of looking at your risk for having a heart attack or stroke, heart age is an easy way for us to talk about it. (cdc.gov)
  • Using information from the Framingham Heart Study and data collected from every US state, CDC projections show that around 69 million US adults that haven't had a heart attack or stroke, have a heart age that is 5 or more years older than their actual age. (cdc.gov)
  • Requiring most health plans to cover recommended preventive services at no out-of-pocket cost (such as co-pays or deductibles) through the Affordable Care Act External external icon , for example, blood pressure screening and tobacco cessation interventions and counseling to prevent heart disease and stroke. (cdc.gov)
  • Providing resources to all 50 states to address chronic disease prevention, including heart disease and stroke, including through the Prevention and Public Health Fund. (cdc.gov)
  • Prevent heart disease and stroke by using easily understood communication materials to promote how to lower heart age and reduce the risk of heart attack and stroke. (cdc.gov)
  • This can lead to heart failure, sudden cardiac arrest (when the heart stops beating), and death. (cdc.gov)
  • Heart failure happens when the heart cannot pump enough blood and oxygen to support other organs in your body. (cdc.gov)
  • People with diabetes are also more likely to have heart failure . (cdc.gov)
  • Heart failure tends to get worse over time, but early diagnosis and treatment can help relieve symptoms and stop or delay the condition getting worse. (cdc.gov)
  • Heart failure - when your heart is too weak or stiff to pump enough oxygen-rich blood to meet your body's needs. (medlineplus.gov)
  • Despite these compensatory mechanisms, the ability of the heart to contract and relax declines progressively, and heart failure (HF) worsens. (medscape.com)
  • Classification of heart failure is based on symptoms and calculated left ventricular ejection fraction (LVEF). (medscape.com)
  • Heart failure due to left ventricular dysfunction is categorized into HF with reduced ejection fraction, HF with preserved ejection fraction, and HF with midrange ejection fraction. (medscape.com)
  • Virtually all patients with heart failure (HF) have at least one other comorbid condition . (medscape.com)
  • In general, most cases of dengue myocarditis are self -limited, with only a minority at risk of progressing to heart failure . (bvsalud.org)
  • Nearly 25,000 deaths in the U.S. each year are due to heart valve disease from causes other than rheumatic disease. (cdc.gov)
  • Intravenous drug use can also lead to endocarditis and cause heart valve disease. (cdc.gov)
  • You can lower your risk for heart disease with lifestyle changes. (cdc.gov)
  • Diabetes and heart disease often go hand in hand. (cdc.gov)
  • Heart disease is very common and serious. (cdc.gov)
  • The longer you have diabetes, the more likely you are to have heart disease. (cdc.gov)
  • But the good news is that you can lower your risk for heart disease and improve your heart health by changing certain lifestyle habits. (cdc.gov)
  • Heart disease includes several kinds of problems that affect your heart. (cdc.gov)
  • Having both high blood pressure and diabetes can greatly increase your risk for heart disease. (cdc.gov)
  • Your blood pressure, cholesterol levels, and weight will help your doctor understand your overall risk for heart disease. (cdc.gov)
  • Efforts to understand cardiac disease progression and develop therapeutic tissues that can repair the human heart are just a few areas of focus for the Feinberg research group at Carnegie Mellon University. (eurekalert.org)
  • Our lab has been working for a long time on engineering and building human heart muscle tissue, so we can better track how disease manifests and also, create therapeutic tissues to one day repair and replace heart damage," explains Adam Feinberg, a professor of biomedical engineering and materials science and engineering. (eurekalert.org)
  • Hemodynamic loads, or the preload (stretch on heart muscle during chamber filling) and afterload (when the heart muscle contracts), are important not only for healthy heart muscle function, but can also contribute to cardiac disease progression. (eurekalert.org)
  • However, using cells from patients with certain types of heart disease, these same exercise-like loads can result in heart muscle dysfunction. (eurekalert.org)
  • Heart disease is the leading cause of death in the United States, causing about 1 in 4 deaths. (cdc.gov)
  • Several factors can be involved in the increased risk for heart disease. (cdc.gov)
  • The Tracking Network uses data from the U.S. Census Bureau external icon , hospital and emergency department databases provided by state and/or local health departments, and death certificates from the National Center for Health Statistics to calculate state and local data about heart disease. (cdc.gov)
  • Estimates of prevalence of heart attacks and ischemic heart disease are largely based on survey samples (e.g. (cdc.gov)
  • By combining these new results with our previous work involving 3D bioprinting heart muscle ( published in Science in 2019 ), we hope to one day engineer tissues large and functional enough to implant, and repair the human heart," projects Feinberg. (eurekalert.org)
  • Inability of the heart to pump a sufficient amount of blood to meet the needs of body tissues may be the result of insufficient or defective cardiac filling and/or impaired contraction and emptying. (medscape.com)
  • Compensatory mechanisms increase blood volume, as well as cardiac filling pressure, heart rate, and cardiac muscle mass, to maintain the pumping function of the heart and to cause redistribution of blood flow. (medscape.com)
  • A series of activities was launched at the Cardiac Centre, Pamplemousses on 29 September 2020 to mark the World Heart Day in Mauritius. (who.int)
  • The infection can settle on the heart valves and damage the leaflets. (cdc.gov)
  • Over time, high blood sugar can damage blood vessels and the nerves that control your heart. (cdc.gov)
  • Malinski's team found that vitamin D3 has a restorative effect on the cardiovascular system, reducing the risk of heart attack and repairing damage done by hypertension, atherosclerosis, and diabetes. (healthline.com)
  • The 5-10% who later die are those who have suffered major heart muscle damage, or who suffer an " extension " or enlargement of their heart attack. (rxlist.com)
  • Repairs heart damage or problems with how the heart and blood vessels are formed. (medlineplus.gov)
  • Nuclear imaging can be used in the assessment of both heart function and damage in patients with CHF. (medscape.com)
  • The sooner the individual can get to an emergency room, the better their chances for reducing damage to the heart. (medlineplus.gov)
  • When paramedics arrive, medications and/or electrical shock ( cardioversion ) to the heart can be administered to convert ventricular fibrillation to a normal heart rhythm. (rxlist.com)
  • Patients suffering a heart attack are usually hospitalized for several days to detect heart rhythm disturbance, and observe for shortness of breath and chest pain . (rxlist.com)
  • They can be used to identify trends and patterns in hospitalizations due to heart attacks or strokes. (cdc.gov)
  • They can also be used to help estimate the number of hospital admissions for either heart attacks or strokes. (cdc.gov)
  • About 3 in 4 heart attacks and strokes are due to risk factors that increase heart age. (cdc.gov)
  • Leading the national Million Hearts® External external icon initiative to prevent 1 million heart attacks and strokes by 2017. (cdc.gov)
  • Healthy heart valve leaflets are able to fully open and close the valve during the heartbeat, but diseased valves might not fully open and close. (cdc.gov)
  • Work with your doctor to make heart healthy choices for a lower heart age. (cdc.gov)
  • The normal heart has four chambers (right and left atria, and right and left ventricles) and four valves (Figure 1). (cdc.gov)
  • The valves open and close to control or regulate the blood flowing into the heart and then away from the heart. (cdc.gov)
  • Three of the heart valves are composed of three leaflets or flaps that work together to open and close to allow blood to flow across the opening. (cdc.gov)
  • Diseased heart valves might not fully open and close. (cdc.gov)
  • If the heart valves are diseased, the heart can't effectively pump blood throughout the body and has to work harder to pump, either while the blood is leaking back into the chamber or against a narrowed opening. (cdc.gov)
  • Low level exposure to TCE during the first two months of pregnancy may impact the formation of your developing baby's heart wall and valves. (cdc.gov)
  • Repairs heart valves. (medlineplus.gov)
  • Replaces heart valves with a mechanical valve or a biologic valve made from pig, cow, or human heart tissue. (medlineplus.gov)
  • It's the most common heart surgery in adults. (medlineplus.gov)
  • She's not alone because most American adults have a heart that is older than their actual age. (cdc.gov)
  • US adults have hearts 7 years older than they should be. (cdc.gov)
  • In new research published in Science Translational Medicine, the group introduces a system comprised of engineered heart muscle tissue (EHT) that is attached to an elastic strip designed to mimic physiologic preloads and afterloads. (eurekalert.org)
  • Death of the heart muscle, in turn, causes chest pain and electrical instability of the heart muscle tissue . (rxlist.com)
  • The heart pumps blood through blood vessels called "arteries" and then through smaller blood vessels called "capillaries" to each organ and tissue in the body. (cdc.gov)
  • A heart attack, or acute myocardial infarction, happens when the blood supply to part of the heart muscle is severely reduced or stopped. (cdc.gov)
  • Get regular checkups to keep track of your heart health. (cdc.gov)
  • A one-page health tracker that keeps track of important numbers related to your heart health. (nih.gov)
  • Heart rate monitoring watches make life easier for anyone wanting to monitor their heart health or track their heart rate for maximum benefit during exercise. (medicalnewstoday.com)
  • When administered at your doctor's office, an ECG looks at 12 areas of the heart to give a robust picture of its health, but Apple's ECG app focuses on only one. (businessinsider.com)
  • The approach a surgeon uses to do heart surgery depends on your heart problem, your general health, and other factors. (medlineplus.gov)
  • Calculate heart age among your patients aged 30-74 and talk with them about the effect of risk factors on their heart health. (cdc.gov)
  • Preload and afterload can lead to maladaptive changes in heart muscle, as is the case of hypertension, myocardial infarction, and cardiomyopathies. (eurekalert.org)
  • A heart attack is also called a myocardial infarction or an MI . (rxlist.com)
  • Many heart attack deaths are due to ventricular fibrillation that occurs before the victim can reach any medical assistance or the emergency room. (rxlist.com)
  • Early heart attack deaths can be avoided if a bystander starts CPR ( cardiopulmonary resuscitation ) within five minutes of the onset of ventricular fibrillation. (rxlist.com)
  • The electrical instability of the heart causes ventricular fibrillation (chaotic electrical disturbances affecting the ventricles , the lower chambers of the heart). (rxlist.com)
  • A heart undergoing ventricular fibrillation simply quivers and can not pump or deliver oxygenated blood to the brain . (rxlist.com)
  • A ventricular assist device to help the heart pump blood. (medlineplus.gov)
  • The patient had received a heart-lung transplant 17 years earlier because of Eisenmenger syndrome related to ventricular septal defect. (cdc.gov)
  • The heart and blood vessels (arteries, capillaries, and veins) are called the cardiovascular system . (cdc.gov)
  • CPR involves breathing for the victim and applying external chest compression to make the heart pump. (rxlist.com)
  • Open-heart surgery (also called traditional heart surgery) is when the surgeon cuts the chest open to reach the heart. (medlineplus.gov)
  • It is popular with people who like to measure their heart rate whilst exercising. (medicalnewstoday.com)
  • The Blue Heart Campaign raises awareness around the globe on human trafficking and its impact on people and society. (unodc.org)
  • 18 years and pregnant women were excluded as were people with extreme ranges SMI, heart rate, height and waist. (who.int)
  • The Blue Heart Campaign encourages involvement of governments, civil society, the corporate sector and individuals alike to inspire action and help prevent human trafficking. (unodc.org)
  • A heart-lung bypass machine keeps oxygen-rich blood pumping through the body during the surgery. (medlineplus.gov)
  • Off-pump heart surgery is open-heart surgery on a beating heart without using a heart-lung bypass machine. (medlineplus.gov)
  • This type of heart surgery may or may not use a heart-lung bypass machine. (medlineplus.gov)
  • Clinical and laboratory data over time for a heart-lung transplant patient in France who had cytolytic hepatitis caused by HCirV-1 develop. (cdc.gov)
  • This device also offers heart rate tracking, GPS tracking, blood oxygen saturation, and a variety of other features for runners. (medicalnewstoday.com)
  • A heart attack occurs when the flow of oxygenated blood suddenly becomes blocked, and a section of the heart can't get oxygen. (medlineplus.gov)
  • The infection can cause scarring of the heart valve . (cdc.gov)
  • Endocarditis is an infection of the inner lining of the heart caused by a severe infection in the blood. (cdc.gov)
  • The most common reasons for a higher heart age that can be changed or managed are: high blood pressure, high cholesterol, smoking, obesity, unhealthy diet, physical inactivity, and diabetes. (cdc.gov)
  • An echocardiogram (echo) to examine how thick your heart muscle is and how well your heart pumps. (cdc.gov)
  • The group's latest dynamic model, created in partnership with collaborators in the Netherlands, mimics physiologic loads on engineering heart muscle tissues, yielding an unprecedented view of how genetics and mechanical forces contribute to heart muscle function. (eurekalert.org)
  • One of the challenges is that we have to build these small pieces of heart muscle in a petri dish, and we've been doing that for many years. (eurekalert.org)
  • This first-of-its-kind model shows that recreating exercise-like loading drives formation of more functional heart muscle that is better organized and generates more force each time it contracts. (eurekalert.org)
  • We have been able to get patient-specific induced pluripotent stem cells, differentiate these into heart muscle cells, and then use these in our new EHT model to recreate ACM in a petri dish, so we can better understand it. (eurekalert.org)
  • We can take lessons learned from building the EHT in a dish to create larger pieces of heart muscle that could be used therapeutically. (eurekalert.org)
  • The death of heart muscle due to the loss of blood supply. (rxlist.com)
  • Myocardial refers to the myocardium , the heart muscle. (rxlist.com)
  • Treats atrial fibrillation with small cuts in the heart muscle. (medlineplus.gov)
  • Uses a laser to make small channels through part of the heart muscle (transmyocardial laser revascularization). (medlineplus.gov)
  • If blood flow isn't restored quickly, that section of heart muscle begins to die. (medlineplus.gov)
  • Learn how to protect your heart with simple lifestyle changes that can also help you manage diabetes. (cdc.gov)
  • Because of its narrow monitoring focus, Apple's ECG app is designed specifically to monitor for just one common heart condition: an irregular heartbeat called atrial fibrillation (AFib) . (businessinsider.com)
  • Orderly transmission of electrical signals in the heart is important for the regular beating (and the efficient pumping) of the heart. (rxlist.com)
  • From measuring your fitness goals to controlling your other Apple devices, the Apple Watch has myriad useful features for users in its newest iteration, including an FDA-approved heart rate monitoring app that can perform an electrocardiogram (ECG). (businessinsider.com)
  • What is a heart rate monitor? (medicalnewstoday.com)
  • The two most common ways to measure heart rate is by electrical and optical monitors. (medicalnewstoday.com)
  • The monitor or transmitter detects a heartbeat and sends it to the receiver, which then displays the heart rate on a screen. (medicalnewstoday.com)
  • For runners who wish to track their heart rate , the following watches could be suitable options. (medicalnewstoday.com)
  • The Apple Watch's ECG testing capability can help you monitor your heart rate. (businessinsider.com)
  • For example, surgery for a severe heart attack may need to be done right away. (medlineplus.gov)
  • Any valve in the heart can become diseased, but the aortic valve is most commonly affected. (cdc.gov)
  • What we've realized is that these in-vitro systems do not accurately recreate the mechanical loading we see in the real heart due to blood pressure. (eurekalert.org)
  • But her heart is 75 years old because she smokes and has uncontrolled high blood pressure. (cdc.gov)
  • If you smoke or have high blood pressure, your heart age will be much higher than your actual age. (cdc.gov)
  • Having an ideal blood pressure (less than 120/80) lowers your heart age. (cdc.gov)
  • This article is a contribution to the epistemology psychoanalysis based on what the authors call 'psychoanalysis heart', i.e. a particular way of understanding, analysing and transforming affects, which highly recommends psychoanalytic participation in contemporary interdisciplinary dialogues, in order to answer social and cultural needs. (bvsalud.org)
  • Therefore, prompt CPR and rapid paramedic response can improve the survival chances from a heart attack. (rxlist.com)
  • That's the perfect time to wear our high quality Heart Men's Pajamas. (cafepress.com)
  • TCE exposure for a short period of time, at a very high concentration, can cause your heart to beat abnormally during the exposure. (cdc.gov)
  • In other cases, you can plan heart surgery ahead of time. (medlineplus.gov)
  • Take action at any age to lower your heart age and keep it low over time. (cdc.gov)
  • Your heartbeat is the result of an electrical impulse traveling through your heart. (cdc.gov)
  • If the ECG measures a heartbeat that is too fast, too slow, or irregular, it could be an early sign of a heart condition. (businessinsider.com)