The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
Measurement of blood flow based on induction at one point of the circulation of a known change in the intravascular heat content of flowing blood and detection of the resultant change in temperature at a point downstream.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
Striated muscle cells found in the heart. They are derived from cardiac myoblasts (MYOBLASTS, CARDIAC).
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 hollow, muscular organ that maintains the circulation of the blood.
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.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
Method for assessing flow through a system by injection of a known quantity of dye into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)
A state of elevated cardiac output due to conditions of either increased hemodynamic demand or reduced cardiac oxygen output. These conditions may include ANEMIA; ARTERIOVENOUS FISTULA; THYROTOXICOSIS; PREGNANCY; EXERCISE; FEVER; and ANOXIA. In time, compensatory changes of the heart can lead to pathological form of high cardiac output and eventual HEART FAILURE.
Surgery performed on the heart.
A type of impedance plethysmography in which bioelectrical impedance is measured between electrodes positioned around the neck and around the lower thorax. It is used principally to calculate stroke volume and cardiac volume, but it is also related to myocardial contractility, thoracic fluid content, and circulation to the extremities.
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.
Any disturbances of the normal rhythmic beating of the heart or MYOCARDIAL CONTRACTION. Cardiac arrhythmias can be classified by the abnormalities in HEART RATE, disorders of electrical impulse generation, or impulse conduction.
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)
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)
The flow of BLOOD through or around an organ or region of the body.
Placement of a balloon-tipped catheter into the pulmonary artery through the antecubital, subclavian, and sometimes the femoral vein. It is used to measure pulmonary artery pressure and pulmonary artery wedge pressure which reflects left atrial pressure and left ventricular end-diastolic pressure. The catheter is threaded into the right atrium, the balloon is inflated and the catheter follows the blood flow through the tricuspid valve into the right ventricle and out into the pulmonary artery.
Examinations used to diagnose and treat heart conditions.
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)
Contractile activity of the MYOCARDIUM.
The circulation of the BLOOD through the LUNGS.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Regulation of the rate of contraction of the heart muscles by an artificial pacemaker.
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.
The movement of the BLOOD as it is pumped through the CARDIOVASCULAR SYSTEM.
Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.
The lower right and left chambers of the heart. The right ventricle pumps venous BLOOD into the LUNGS and the left ventricle pumps oxygenated blood into the systemic arterial circulation.
The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine.
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.
Pathological conditions involving the HEART including its structural and functional abnormalities.
Elements of limited time intervals, contributing to particular results or situations.
Compression of the heart by accumulated fluid (PERICARDIAL EFFUSION) or blood (HEMOPERICARDIUM) in the PERICARDIUM surrounding the heart. The affected cardiac functions and CARDIAC OUTPUT can range from minimal to total hemodynamic collapse.
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.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
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.
Methods for assessing flow through a system by injection of a known quantity of an indicator, such as a dye, radionuclide, or chilled liquid, into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)
Processes and properties of the CARDIOVASCULAR SYSTEM as a whole or of any of its parts.
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.
The blood pressure in the central large VEINS of the body. It is distinguished from peripheral venous pressure which occurs in an extremity.
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.
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.
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.
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
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).
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.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.
Measurement of oxygen and carbon dioxide in the blood.
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.
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).
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 blood pressure as recorded after wedging a CATHETER in a small PULMONARY ARTERY; believed to reflect the PRESSURE in the pulmonary CAPILLARIES.
The HEART and the BLOOD VESSELS by which BLOOD is pumped and circulated through the body.
The hemodynamic and electrophysiological action of the HEART VENTRICLES.
The circulation of blood through the CORONARY VESSELS of the HEART.
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).
The exchange of OXYGEN and CARBON DIOXIDE between alveolar air and pulmonary capillary blood that occurs across the BLOOD-AIR BARRIER.
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.
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.
Method for determining the circulating blood volume by introducing a known quantity of foreign substance into the blood and determining its concentration some minutes later when thorough mixing has occurred. From these two values the blood volume can be calculated by dividing the quantity of injected material by its concentration in the blood at the time of uniform mixing. Generally expressed as cubic centimeters or liters per kilogram of body weight.
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.
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.
Abnormally low BLOOD PRESSURE that can result in inadequate blood flow to the brain and other vital organs. Common symptom is DIZZINESS but greater negative impacts on the body occur when there is prolonged depravation of oxygen and nutrients.
The circulation of blood through the BLOOD VESSELS supplying the abdominal VISCERA.
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.
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
The transference of a heart from one human or animal to another.
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 constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).
Recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. (Stedman, 25th ed)
Diversion of the flow of blood from the entrance of the right atrium directly to the aorta (or femoral artery) via an oxygenator thus bypassing both the heart and lungs.
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.
Precursor cells destined to differentiate into cardiac myocytes (MYOCYTES, CARDIAC).
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.
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
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.
An adrenergic alpha-2 agonist used as a sedative, analgesic and centrally acting muscle relaxant in VETERINARY MEDICINE.
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.
Myosin type II isoforms found in cardiac muscle.
Visualization of the heart structure and cardiac blood flow for diagnostic evaluation or to guide cardiac procedures via techniques including ENDOSCOPY (cardiac endoscopy, sometimes refered to as cardioscopy), RADIONUCLIDE IMAGING; MAGNETIC RESONANCE IMAGING; TOMOGRAPHY; or ULTRASONOGRAPHY.
Any of the ruminant mammals with curved horns in the genus Ovis, family Bovidae. They possess lachrymal grooves and interdigital glands, which are absent in GOATS.
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.
Relatively complete absence of oxygen in one or more tissues.
Therapy whose basic objective is to restore the volume and composition of the body fluids to normal with respect to WATER-ELECTROLYTE BALANCE. Fluids may be administered intravenously, orally, by intermittent gavage, or by HYPODERMOCLYSIS.
A tricarbocyanine dye that is used diagnostically in liver function tests and to determine blood volume and cardiac output.
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.
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.
Freedom from activity.
One of the three polypeptide chains that make up the TROPONIN complex. It inhibits F-actin-myosin interactions.
Cyclopentanophenanthrenes with a 5- or 6-membered lactone ring attached at the 17-position and SUGARS attached at the 3-position. Plants they come from have long been used in congestive heart failure. They increase the force of cardiac contraction without significantly affecting other parameters, but are very toxic at larger doses. Their mechanism of action usually involves inhibition of the NA(+)-K(+)-EXCHANGING ATPASE and they are often used in cell biological studies for that purpose.
A state characterized by loss of feeling or sensation. This depression of nerve function is usually the result of pharmacologic action and is induced to allow performance of surgery or other painful procedures.
The restoration of the sequential order of contraction and relaxation of the HEART ATRIA and HEART VENTRICLES by atrio-biventricular pacing.
The restoration to life or consciousness of one apparently dead. (Dorland, 27th ed)
A catecholamine derivative with specificity for BETA-1 ADRENERGIC RECEPTORS. It is commonly used as a cardiotonic agent after CARDIAC SURGERY and during DOBUTAMINE STRESS ECHOCARDIOGRAPHY.
A potent natriuretic and vasodilatory peptide or mixture of different-sized low molecular weight PEPTIDES derived from a common precursor and secreted mainly by the HEART ATRIUM. All these peptides share a sequence of about 20 AMINO ACIDS.
The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value.
The blood pressure in the ARTERIES. It is commonly measured with a SPHYGMOMANOMETER on the upper arm which represents the arterial pressure in the BRACHIAL ARTERY.
The posture of an individual lying face up.
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.
The artificial substitution of heart and lung action as indicated for HEART ARREST resulting from electric shock, DROWNING, respiratory arrest, or other causes. The two major components of cardiopulmonary resuscitation are artificial ventilation (RESPIRATION, ARTIFICIAL) and closed-chest CARDIAC MASSAGE.
The position or attitude of the body.
A general class of ortho-dihydroxyphenylalkylamines derived from tyrosine.
An abnormally low volume of blood circulating through the body. It may result in hypovolemic shock (see SHOCK).
The circulation of BLOOD through the LIVER.
Occurrence of heart arrest in an individual when there is no immediate access to medical personnel or equipment.
Post-systolic relaxation of the HEART, especially the HEART VENTRICLES.
The hemodynamic and electrophysiological action of the right HEART VENTRICLE.
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.
The chambers of the heart, to which the BLOOD returns from the circulation.
The pressure that would be exerted by one component of a mixture of gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Period of contraction of the HEART, especially of 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.
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).
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 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.
The main trunk of the systemic arteries.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
A pathological condition manifested by failure to perfuse or oxygenate vital organs.
The exercise capacity of an individual as measured by endurance (maximal exercise duration and/or maximal attained work load) during an EXERCISE TEST.
Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.
Drugs used to cause dilation of the blood vessels.
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.
Receptors in the vascular system, particularly the aorta and carotid sinus, which are sensitive to stretch of the vessel walls.
The hemodynamic and electrophysiological action of the RIGHT ATRIUM.
Surgical therapy of ischemic coronary artery disease achieved by grafting a section of saphenous vein, internal mammary artery, or other substitute between the aorta and the obstructed coronary artery distal to the obstructive lesion.
An impulse-conducting system composed of modified cardiac muscle, having the power of spontaneous rhythmicity and conduction more highly developed than the rest of the heart.
A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.
Small uniformly-sized spherical particles, of micrometer dimensions, frequently labeled with radioisotopes or various reagents acting as tags or markers.
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.
The measure of a BLOOD VESSEL's ability to increase the volume of BLOOD it holds without a large increase in BLOOD PRESSURE. The vascular capacitance is equal to the change in volume divided by the change in pressure.
The period of care beginning when the patient is removed from surgery and aimed at meeting the patient's psychological and physical needs directly after surgery. (From Dictionary of Health Services Management, 2d ed)
A conical fibro-serous sac surrounding the HEART and the roots of the great vessels (AORTA; VENAE CAVAE; PULMONARY ARTERY). Pericardium consists of two sacs: the outer fibrous pericardium and the inner serous pericardium. The latter consists of an outer parietal layer facing the fibrous pericardium, and an inner visceral layer (epicardium) resting next to the heart, and a pericardial cavity between these two layers.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.
The period following a surgical operation.
The ratio of alveolar ventilation to simultaneous alveolar capillary blood flow in any part of the lung. (Stedman, 25th ed)
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.
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.
The measurement of an organ in volume, mass, or heaviness.
The measure of the level of heat of a human or animal.
A nonflammable, halogenated, hydrocarbon anesthetic that provides relatively rapid induction with little or no excitement. Analgesia may not be adequate. NITROUS OXIDE is often given concomitantly. Because halothane may not produce sufficient muscle relaxation, supplemental neuromuscular blocking agents may be required. (From AMA Drug Evaluations Annual, 1994, p178)
Drugs that selectively bind to and activate beta-adrenergic receptors.
Diversion of blood flow through a circuit located outside the body but continuous with the bodily circulation.
Compounds of the general formula R:N.NR2, as resulting from the action of hydrazines with aldehydes or ketones. (Grant & Hackh's Chemical Dictionary, 5th ed)
Any liquid used to replace blood plasma, usually a saline solution, often with serum albumins, dextrans or other preparations. These substances do not enhance the oxygen- carrying capacity of blood, but merely replace the volume. They are also used to treat dehydration.
Bleeding or escape of blood from a vessel.
Treatment process involving the injection of fluid into an organ or tissue.
The relationship between the dose of an administered drug and the response of the organism to the drug.
External decompression applied to the lower body. It is used to study orthostatic intolerance and the effects of gravitation and acceleration, to produce simulated hemorrhage in physiologic research, to assess cardiovascular function, and to reduce abdominal stress during childbirth.
The vessels carrying blood away from the heart.
An involuntary movement or exercise of function in a part, excited in response to a stimulus applied to the periphery and transmitted to the brain or spinal cord.
Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.
Reduction of blood viscosity usually by the addition of cell free solutions. Used clinically (1) in states of impaired microcirculation, (2) for replacement of intraoperative blood loss without homologous blood transfusion, and (3) in cardiopulmonary bypass and hypothermia.
One of the three polypeptide chains that make up the TROPONIN complex. It is a cardiac-specific protein that binds to TROPOMYOSIN. It is released from damaged or injured heart muscle cells (MYOCYTES, CARDIAC). Defects in the gene encoding troponin T result in FAMILIAL HYPERTROPHIC CARDIOMYOPATHY.
A highly specific (Leu-Leu) endopeptidase that generates ANGIOTENSIN I from its precursor ANGIOTENSINOGEN, leading to a cascade of reactions which elevate BLOOD PRESSURE and increase sodium retention by the kidney in the RENIN-ANGIOTENSIN SYSTEM. The enzyme was formerly listed as EC
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.
Sepsis associated with HYPOTENSION or hypoperfusion despite adequate fluid resuscitation. Perfusion abnormalities may include, but are not limited to LACTIC ACIDOSIS; OLIGURIA; or acute alteration in mental status.
The long-term (minutes to hours) administration of a fluid into the vein through venipuncture, either by letting the fluid flow by gravity or by pumping it.
Any pathological condition where fibrous connective tissue invades any organ, usually as a consequence of inflammation or other injury.
Advanced and highly specialized care provided to medical or surgical patients whose conditions are life-threatening and require comprehensive care and constant monitoring. It is usually administered in specially equipped units of a health care facility.
Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.
Any method of artificial breathing that employs mechanical or non-mechanical means to force the air into and out of the lungs. Artificial respiration or ventilation is used in individuals who have stopped breathing or have RESPIRATORY INSUFFICIENCY to increase their intake of oxygen (O2) and excretion of carbon dioxide (CO2).
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.
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.
Plethysmographic determination in which the intensity of light reflected from the skin surface and the red cells below is measured to determine the blood volume of the respective area. There are two types, transmission and reflectance.
Diet modification and physical exercise to improve the ability of animals to perform physical activities.
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.
Excessive accumulation of extravascular fluid in the lung, an indication of a serious underlying disease or disorder. Pulmonary edema prevents efficient PULMONARY GAS EXCHANGE in the PULMONARY ALVEOLI, and can be life-threatening.
A subfield of acoustics dealing in the radio frequency range higher than acoustic SOUND waves (approximately above 20 kilohertz). Ultrasonic radiation is used therapeutically (DIATHERMY and ULTRASONIC THERAPY) to generate HEAT and to selectively destroy tissues. It is also used in diagnostics, for example, ULTRASONOGRAPHY; ECHOENCEPHALOGRAPHY; and ECHOCARDIOGRAPHY, to visually display echoes received from irradiated tissues.
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.
Institutions specializing in the care of patients with heart disorders.
Characteristics of ELECTRICITY and magnetism such as charged particles and the properties and behavior of charged particles, and other phenomena related to or associated with electromagnetism.
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).
The physical or mechanical action of the LUNGS; DIAPHRAGM; RIBS; and CHEST WALL during respiration. It includes airflow, lung volume, neural and reflex controls, mechanoreceptors, breathing patterns, etc.
Cardiac arrhythmias that are characterized by excessively slow HEART RATE, usually below 50 beats per minute in human adults. They can be classified broadly into SINOATRIAL NODE dysfunction and ATRIOVENTRICULAR BLOCK.
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.
Echocardiography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
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.
A normal intermediate in the fermentation (oxidation, metabolism) of sugar. The concentrated form is used internally to prevent gastrointestinal fermentation. (From Stedman, 26th ed)
Refers to animals in the period of time just after birth.
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.
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.
The hemodynamic and electrophysiological action of the HEART ATRIA.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
A type of imaging technique used primarily in the field of cardiology. By coordinating the fast gradient-echo MRI sequence with retrospective ECG-gating, numerous short time frames evenly spaced in the cardiac cycle are produced. These images are laced together in a cinematic display so that wall motion of the ventricles, valve motion, and blood flow patterns in the heart and great vessels can be visualized.
The vessels carrying blood away from the capillary beds.
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
An alpha-1 adrenergic agonist used as a mydriatic, nasal decongestant, and cardiotonic agent.
A standard and widely accepted diagnostic test used to identify patients who have a vasodepressive and/or cardioinhibitory response as a cause of syncope. (From Braunwald, Heart Disease, 7th ed)
The rhythmical expansion and contraction of an ARTERY produced by waves of pressure caused by the ejection of BLOOD from the left ventricle of the HEART as it contracts.
Distensibility measure of a chamber such as the lungs (LUNG COMPLIANCE) or bladder. Compliance is expressed as a change in volume per unit change in pressure.
The veins and arteries of the HEART.
The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.
The heart rate of the FETUS. The normal range at term is between 120 and 160 beats per minute.
A transient loss of consciousness and postural tone caused by diminished blood flow to the brain (i.e., BRAIN ISCHEMIA). Presyncope refers to the sensation of lightheadedness and loss of strength that precedes a syncopal event or accompanies an incomplete syncope. (From Adams et al., Principles of Neurology, 6th ed, pp367-9)
The study of the electrical activity and characteristics of the HEART; MYOCARDIUM; and CARDIOMYOCYTES.

High and low pulmonary vascular resistance in heart transplant candidates. A 5-year follow-up after heart transplantation shows continuous reduction in resistance and no difference in complication rate. (1/22)

BACKGROUND: In heart transplantation candidates, high pulmonary vascular resistance has been found to decrease promptly after heart transplantation without any further reduction during follow-up. Pulmonary hypertension has been described as associated with an increased peri- and postoperative complication rate and mortality. This study describes the evolution of pulmonary vascular resistance and the outcome for patients during 5 years following heart transplantation. METHODS AND RESULTS: Haemodynamic data, complication rate and mortality have been analysed during 5-year follow-up in all patients (n = 80) who were heart transplanted at Sahlgrenska University Hospital from 1988 through 1990. We found a significant and continuous reduction in pulmonary vascular resistance both in patients with a pre-operative high (> 3 Wood Units; n = 36), but reversible on nitroprusside, and pre-operative low (< or = 3 Wood Units; n = 44) pulmonary vascular resistance. A multivariate analysis showed that a pre-operative high mean pulmonary artery and low mean pulmonary capillary wedge pressure predicted the decline in pulmonary vascular resistance during 5 years after heart transplantation. The need for a postoperative assist device, complication rate, and early and late mortality were independent of the pre-operative level of pulmonary vascular resistance. CONCLUSIONS: A continuous reduction in pulmonary vascular resistance during 5 years following heart transplantation was found in patients with both high, but reversible, and low pre-operative resistance levels. The outcome and survival were independent of the pre-operative pulmonary vascular resistance level.  (+info)

Automated cardiac output measurements by ultrasound are inaccurate at high cardiac outputs. (2/22)

OBJECTIVE: The sonographic technique of automated cardiac output measurement (ACM) is a promising new method to measure cardiac output and could be of use in a high-risk obstetric unit in the treatment of pre-eclamptic patients. The aim was to determine the accuracy of the ACM method. DESIGN: Comparative study of the sonographic technique of ACM versus cardiac output measured by thermodilution (TD). METHODS: The study included 39 intensive care patients, 21 men, 13 non-pregnant women and five severely pre-eclamptic pregnant patients, with a wide range of cardiac outputs, in whom TD catheters had been inserted for clinical reasons. Two separate experienced observers, blinded to the results obtained with the other method, performed four successive measurements in each patient with either the ACM or TD technique. The averaged cardiac output value per patient and method was used for comparison. RESULTS: Cardiac output was successfully measured with ACM and TD in 85 and 100% of patients, respectively. Mean cardiac output measured by ACM (6.77 +/- 1.90 L/min) was significantly lower than that measured by TD (9.12 +/- 3.06 L/min). Although cardiac output values obtained with ACM were significantly correlated with those measured by TD, the ACM values were consistently lower than TD values in the higher cardiac output range; the relationship was represented by ACM = 0.35 TD + 3.55 L/min (r = 0.57, P < 0.001). The (ACM - TD) difference increased significantly with cardiac output, through a difference in stroke volume, not in heart rate. CONCLUSION: The ACM is not an accurate tool to measure cardiac output in patients with a high cardiac output, including treated pre-eclamptic women.  (+info)

Liver disease in patients with hereditary hemorrhagic telangiectasia. (3/22)

BACKGROUND: Hereditary hemorrhagic telangiectasia, or Rendu-Osler-Weber disease, is an autosomal dominant disorder characterized by angiodysplastic lesions (telangiectases and arteriovenous malformations) that affect many organs. Liver involvement in patients with this disease has not been fully characterized. METHODS: We studied the clinical findings and results of hemodynamic, angiographic, and imaging studies in 19 patients with hereditary hemorrhagic telangiectasia and symptomatic liver involvement. RESULTS: We evaluated 14 women and 5 men who ranged in age from 34 to 74 years. All but one of the patients had a hyperdynamic circulation (cardiac index, 4.2 to 7.3 liters per minute per square meter of body-surface area). In eight patients, the clinical findings were consistent with the presence of high-output heart failure. The cardiac index and pulmonary-capillary wedge pressure were elevated in the six patients in whom these measurements were performed. After a median period of 24 months, the condition of three of the eight patients had improved, four were in stable condition with medical therapy, and one had died. Six patients had manifestations of portal hypertension such as ascites or variceal bleeding. The hepatic sinusoidal pressure was elevated in the four patients in whom it was measured. After a median period of 19 months, the condition of two of the six patients had improved, and the other four had died. Five patients had manifestations of biliary disease, such as an elevated alkaline phosphatase level and abnormalities on bile duct imaging. After a median period of 30 months, the condition of two of the five had improved, the condition of one was unchanged, heart failure had developed in one, and one had died after an unsuccessful attempt at liver transplantation. CONCLUSIONS: In patients with hereditary hemorrhagic telangiectasia and symptomatic liver-involvement, the typical clinical presentations include high-output heart failure, portal hypertension, and biliary disease.  (+info)

Crow-Fukase syndrome associated with high-output heart failure. (4/22)

A 64-year-old woman was admitted with systemic edema and exertional dyspnea. High-output heart failure was diagnosed by right heart catheterization and she was treated with diuretics. After 3 weeks, her symptoms disappeared but a high cardiac output state persisted. A diagnosis of Crow-Fukase syndrome was made based on the presence of polyneuropathy, organomegaly, endocrinopathy, M-protein, and skin changes. Her serum vascular endothelial growth factor (VEGF) level was markedly elevated after recovery from heart failure. We suspect that an elevated VEGF level and a high cardiac output state may play a role in the pathogenesis of heart failure in Crow-Fukase syndrome.  (+info)

Comparison of bedside measurement of cardiac output with the thermodilution method and the Fick method in mechanically ventilated patients. (5/22)

INTRODUCTION: Bedside cardiac output determination is a common preoccupation in the critically ill. All available methods have drawbacks. We wished to re-examine the agreement between cardiac output determined using the thermodilution method (QTTHERM) and cardiac output determined using the metabolic (Fick) method (QTFICK) in patients with extremely severe states, all the more so in the context of changing practices in the management of patients. Indeed, the interchangeability of the methods is a clinically relevant question; for instance, in view of the debate about the risk-benefit balance of right heart catheterization. PATIENTS AND METHODS: Eighteen mechanically ventilated passive patients with a right heart catheter in place were studied (six women, 12 men; age, 39-84 years; simplified acute physiology scoreII, 39-111). QTTHERM was obtained using a standard procedure. QTFICK was measured from oxygen consumption, carbon dioxide production, and arterial and mixed venous oxygen contents. Forty-nine steady-state pairs of measurements were performed. The data were normalized for repeated measurements, and were tested for correlation and agreement. RESULTS: The QTFICK value was 5.2 +/- 2.0 l/min whereas that of QTTHERM was 5.8 +/- 1.9 l/min (R = 0.840, P < 0.0001; mean difference, -0.7 l/min; lower limit of agreement, -2.8 l/min; upper limit of agreement, 1.5 l/min). The agreement was excellent between the two techniques at QTTHERM values <5 l/min but became too loose for clinical interchangeability above this value. Tricuspid regurgitation did not influence the results. DISCUSSION AND CONCLUSIONS: No gold standard is established to measure cardiac output in critically ill patients. The thermodilution method has known limitations that can lead to inaccuracies. The metabolic method also has potential pitfalls in this context, particularly if there is increased oxygen consumption within the lungs. The concordance between the two methods for low cardiac output values suggests that they can both be relied upon for clinical decision making in this context. Conversely, a high cardiac output value is more difficult to rely on in absolute terms.  (+info)

High output heart failure 8 months after an acquired arteriovenous fistula. (6/22)

Congestive heart failure (CHF) due to hyperkinetic states can occur in systemic diseases and in arteriovenous fistulas. An 18 year old Turkish male patient complaining of dyspnea and palpitations, who had suffered a stab wound to his abdomen eight months earlier, was admitted to our clinic. Auscultation revealed a systolodiastolic murmur over the entire abdomen. Chest x-rays demonstrated significant cardiomegaly. Echocardiography revealed biatrial enlargement and significant mitral and tricuspid regurgitation accompanied by dilatation of the inferior vena cava. Right heart catheterization showed increased oxygen saturation at the inferior vena cava. A diagnosis of an aortocaval fistula was made by aortography. The symptoms subsided and valvular regurgitations ceased alter surgical correction. This rare case demonstrates the significance of routine physical examination and history of the patient.  (+info)

Equipment review: an appraisal of the LiDCO plus method of measuring cardiac output. (7/22)

The LiDCO plus system is a minimally/non-invasive technique of continuous cardiac output measurement. In common with all cardiac output monitors this technology has both strengths and weaknesses. This review discusses the technological basis of the device and its clinical application.  (+info)

Vasoplegic syndrome after off-pump coronary artery bypass surgery: an unusual complication. (8/22)

We report the case of a 65-year-old man who developed norepinephrine-resistant vasoplegic syndrome after elective off-pump coronary artery bypass surgery (OPCAB). The failure of norepinephrine to improve the patient's hemodynamics prompted us to start treatment with vasopressin; within 30 minutes, the hemodynamics began to improve. After 12 hours, the patient was stable enough to be weaned from the vasopressin. He was discharged from the hospital on the 10th postoperative day. To our knowledge, ours is the 1st report of vasopressin use for vasodilatory shock after OPCAB in the English-language medical literature. Herein, we discuss the pathophysiology and management of vasoplegic syndrome--which is controversial--with special emphasis on the use of vasopressin in this situation.  (+info)

Definition of high-output heart failure in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is high-output heart failure? Meaning of high-output heart failure as a legal term. What does high-output heart failure mean in law?
There are a variety of conditions that can significantly increase the bodys need for blood and oxygen, resulting in high-output heart failure. These conditions include anemia, hyperthyroidism, and pregnancy. Although the causes of high-output heart failure are different from the cause of other types of heart failure, the end result is the same: Your heart isnt supplying enough blood to meet your bodys needs. High-output heart failure results in the same symptoms of heart failure, including fatigue and shortness of breath.. ...
BACKGROUND High-output heart failure (HF) is an unusual cause of cardiac failure that has not been well-characterized. OBJECTIVES This study sought to characterize the etiologies, pathophysiology, clinical and hemodynamic characteristics, and outcomes of high-output HF in the modern era. METHODS We performed a retrospective analysis of all consecutive patients referred to the Mayo Clinic catheterization laboratory for hemodynamic assessment between 2000 and 2014. Subjects with definite HF, as defined by the Framingham criteria, were compared to controls of similar age and sex. RESULTS The most common etiologies of high-output HF (n = 120) were obesity (31%), liver disease (23%), arteriovenous shunts (23%), lung disease (16%), and myeloproliferative disorders (8%). Compared with controls (n = 24), subjects with high-output HF displayed eccentric left ventricular remodeling, greater natriuretic peptide activation, higher filling pressures, pulmonary hypertension, and increased cardiac output,
Cardiac Output, High; High Cardiac Output. On-line free medical diagnosis assistant. Ranked list of possible diseases from either several symptoms or a full patient history. A similarity measure between symptoms and diseases is provided.
I recently had a stress echo which found that with exercise my heart did not squeeze properly which looked like balanced cardiac disease to my cardiologist. I was able to do 12 min on the treadmill. I ...
Twenty-five patients were enrolled; all presented cardiac index , 4 l/min/m2. The following parameters were evaluated: heart rate (HR), mean arterial pressure, central venous pressure (CVP), pulmonary capillary wedge pressure (Pw), CO, systolic pulmonary artery pressure (SPAP) and diastolic pulmonary artery pressure (DPAP), systemic vascular resistance index (SVRI), pulmonary vascular resistance index (PVRI), left ventricular stroke work index (LVSWI) and right ventricular stroke work index (RVSWI). The determinations were performed before disconnection from mechanical ventilation, 30 min after disconnection and 4-6 hours after disconnection. ...
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Patients with mild anemia are usually asymptomatic, and the anemia is most commonly discovered on a routine complete blood count (CBC). Even children with moderate-to-severe anemia may be asymptomatic if the problem develops slowly, compensating well for even severely low hemoglobin levels. When the hemoglobin becomes low enough to produce symptoms, patients may present with fatigue, irritability, or shortness of breath on exertion. Physical examination may reveal pallor, tachycardia, jaundice, and systolic ejection murmur owing to an increased cardiac output. With a rapid drop in hemoglobin, the child may develop dizziness, orthostatic hypotension, or high-output cardiac failure. ...
Intraoral lesions must be adequately protected at the time of anesthetic induction or intraoral instrumentation. Intracranial arteriovenous malformations are at risk of rupture if subjected to high swings in arterial blood pressure. Intraocular lesions may bleed for similar reasons. Gastrointestinal hemorrhage and hemoptysis have all been described. If very extensive, multiple arteriovenous malformations may lead to a high-output cardiac failure, requiring treatment before anesthesia and surgery. Central regional anesthesia is best avoided because of the risk of associated medullar angioma. ...
A large proportion of hemangiomas arent connected with complications. On the surface may be broken down by hemangiomas. In case the ulceration is not shallow, major bleeding may happen in rare occasions. Ulceration to the region that is deeper may be difficult and debilitating. Respiration might be compromised if your hemangioma grows in the larynx. A hemangioma obstruct and can grow among the eyes. Quite seldom, hemangiomas that are exceptionally large may cause high-output heart failure because of the quantity of blood that has to be pumped to excessive arteries. Lesions next to bone also can cause erosion.. An individual s look, nevertheless, stalk from psychosocial complications: the illness cans impact and may arouse malicious and focus reactions. Special difficulties happen as distortion may be difficult to treat, whether the lip or nose is involved. The prospect of emotional harm grows from school age on. Thus, it is important if sufficient spontaneous development hasnt occurred to ...
Volume overload refers to the state of one of the chambers of the heart in which too large a volume of blood exists within it for it to function efficiently. Ventricular volume overload is approximately equivalent to an excessively high preload. It is a cause of cardiac failure. In accordance with the Frank-Starling law of the heart, the myocardium contracts more powerfully as the end-diastolic volume increases. Stretching of the myofibrils in cardiac muscle causes them to contract more powerfully due to a greater number of cross-bridges being formed between the myofibrils within cardiac myocytes. This is true up to a point, however beyond this there is a loss of contractile ability due to loss of connection between myofibrils; see figure. Various pathologies, listed below, can lead to volume overload. Different mechanisms are involved depending on the cause, however the common theme is that of a high cardiac output with a low or normal afterload. The output may be high due to the inefficiency ...
Too much exercise can be harmful. Without proper rest, the chance of stroke or other circulation problems increases,[82] and muscle tissue may develop slowly. Extremely intense, long-term cardiovascular exercise, as can be seen in athletes who train for multiple marathons, has been associated with scarring of the heart and heart rhythm abnormalities.[83][84][85] Specifically, high cardiac output has been shown to cause enlargement of the left and right ventricle volumes, increased ventricle wall thickness, and greater cardiac mass. These changes further result in myocardial cell damage in the lining of the heart, leading to scar tissue and thickened walls. During these processes, the protein troponin increases in the bloodstream, indicating cardiac muscle cell death and increased stress on the heart itself.[86]. Inappropriate exercise can do more harm than good, with the definition of inappropriate varying according to the individual. For many activities, especially running and cycling, there ...
The hemodynamics of gestation are characterized by a high cardiac output, low-resistance state associated with a blunted response to angiotensin II.10 Recent studies have suggested a key role for NO in the homeostasis of this physiological condition.10 In both humans and animals,11 12 NO synthesis has been shown to be increased during pregnancy. Blockade of NO synthesis resulted in the elevation of blood pressure and onset of proteinuria, features characteristic of preeclampsia. The usual increase of GFR during gestation was absent11 ; in fact, GFR has even been reported to decrease (unpublished data, 1996). These findings implied the loss of the vasodilator effect of pregnancy, which is probably in large part mediated by NO. Our results in normal rats confirm these data. The decrease in blood pressure and increase in creatinine clearance in PREG rats were associated with a threefold increase in NO production. L-NAME treatment induced hypertension and a reduction of creatinine clearance that ...
When my bp is up I will lay down and take it an hour later. That is just what I do, not a doctor advised thing. That is a really high pulse for not doing anything - even after it went down that is high. My pulse was high all of the time - around 100 and I got diagnosed with a high cardiac output and put on meds at around 22 weeks (by the lovely folks at the UofW). My bps going up to around 125/73, not so high, but they would go up higher every once in awhile. I would talk to your OB about your pulse - I know that other people on here have and their OBs havent been concerned. Maybe Runaway Bride was just too much for you - maybe you need to lay off of the Julia Roberts movies for awhile. Hope you feel better ...
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Elevated cardiac troponin levels were highly predictive of both in-hospital and long-term mortality in patients admitted for CAP.
For this pump to work well it needs a good supply of fuel and oxygen and this is achieved through good blood supply. However, there is a second aspect which is largely ignored by cardiologists and other doctors. The heart needs to be able to convert this fuel and oxygen supply into a usable form of energy for the muscle cells to work. This is achieved by mitochondria. They take fuel and oxygen from the blood and through a complex series of biochemical reactions, including Krebs citric acid cycle and oxidative phosphorylation, they generate ATP, the currency of energy in the body. Each heart cell will hold between 2,000 - 3,000 mitochondria. The reason it needs so many is that the heart never gets a rest - it has to work 24/7! An interesting observation here is that the heart is rich in oxygen and mitochondria - when the latter gets switched off, this is a major risk factor for cancer. One never sees cases of primary cancer of the heart! The heart is only responsible for 60% of blood pressure - ...
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The other reason that I want to mention stress is that my personal opinion is that it is pivotal in the development and maintenance of high blood pressure. And this is why. Essential hypertension tends to always follow the same pattern of development. The first sign you see is an increase in cardiac output (heart beating faster and/or more strongly). The second thing that happens is a return of that cardiac output to normal with a simultaneous increase in the peripheral resistance of the blood vessels (making it harder to get blood through them). Now when I look at that list of risk factors above, the one that leaps out at me as being most likely to be the causative factor for those first steps is stress. Because cortisol is the main stress hormone and it does BOTH of those things. (Incidentally, cortisol is also involved in adjusting calcium and potassium levels,controlling insulin and blood sugar levels, and salt balance. Circumstantial evidence. But a lot of it ...
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DocAquarium was established in 1995. Created by Kevin Phoenix, a hobbyist, and who has been working in aquariumology for over 30 years.. Based in Malibu, DocAquarium is currently designing and servicing aquarium, sculpting live reefs and ponds in Malibu, Santa Monica, Calabasas, Agoura, Pacific Palisades, Beverly Hills, all of Los Angeles and Ventura counties. ...
36 Length, 39 Watts, True Actinic Blue provides light in the 420 nanometer range that reflects color pigments in organisms such as corals, fish and invertebrates causing them to fluoresce glowing colors.
high quality lab single flotation cell_flotation cells mica ore pricecopper froth flotation machine price YouTubeFeb 13, 2016 . Gold, copper flotation machine Mine Engineer.Com provides mining, gold, …rod mill with high output mov
Product Description Eiffel Ocean Guard 6 series is a range of high performance marine multipurpose system oils formulated with high quality paraffinic base stocks and balanced additive system to ensure optimum performance and excellent protection in low speed, high output cross head marine engines, operating on residual fuels. It has sufficient alkalinity to neutralize any strong acidic combustion products which may enter into the crankcase and it demonstrates high load carrying ability under severe operating conditions.. Features & Benefits ...
Features for the 2017 RANGER XP 900 - Camo. High output 68 hp ProStar engine, class-leading 2,000 lbs. towing capacity, and multiple storage options.
There are some caveats with eating anything you want. For one, the whole biochemistry we are discussing relies on some specific inputs in ordre to correctly function. Assuming those are met (vitamins, minerals, some carbs, some fat, some protein), you can eat just about anything within reason and lose weight. If you are running the same calorie deficit and replace a bowl of oatmeal with a slice of cake with equivalent calories, you will still lose the same amount as long as you dont change wha tyou are doing. Often, people reduce their calories and then feel like they have no energy to workout so they reduce their training as well; that clearly doesnt help the situation and can actually result in worsening the composition as I am sure you are aware. I know plenty of people who eat perfectly clean and have no muscle becuase they never lift. I know people who eat horribly and are very fit and muscular because they train hard (high output). Not sure I know a lot of people who eat clean and train ...
Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant disorder characterized by telangiectases and arteriovenous malformations (AVMs) of the skin, mucosa and viscera. Epistaxis is the most frequent presenting finding. Gastrointestinal bleeding and telangiectases on the face, lips, tongue, fingers, and chest are other common clinical features. AVMs within the lungs, liver, and brain are a significant cause of morbidity. Pulmonary AVMs lead to morbidity via direct hemorrhage, heart failure, or shunting of emboli with subsequent brain abscess formation or stroke. AVMs involving the liver can result in hyperdynamic circulation and cause high output heart failure. Additionally, intrahepatic arteriovenous shunts may lead to cirrhosis and resultant bleeding esophageal varices. Cerebrovascular malformations causing intracranial hemorrhage also occur. Other organs known to be affected by telangiectasia or AVMs include the bladder, eyes and kidneys. HHT is caused by mutations in the ENG ...
Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant disorder characterized by telangiectases and arteriovenous malformations (AVMs) of the skin, mucosa and viscera. Epistaxis is the most frequent presenting finding. Gastrointestinal bleeding and telangiectases on the face, lips, tongue, fingers, and chest are other common clinical features. AVMs within the lungs, liver, and brain are a significant cause of morbidity. Pulmonary AVMs lead to morbidity via direct hemorrhage, heart failure, or shunting of emboli with subsequent brain abscess formation or stroke. AVMs involving the liver can result in hyperdynamic circulation and cause high output heart failure. Additionally, intrahepatic arteriovenous shunts may lead to cirrhosis and resultant bleeding esophageal varices. Cerebrovascular malformations causing intracranial hemorrhage also occur. Other organs known to be affected by telangiectasia or AVMs include the bladder, eyes and kidneys. HHT is caused by mutations in the ENG ...
METHOD OF TREATMENT - The present invention relates generally to a method of treatment and in particular a method of treating a subject exhibiting symptoms of kidney failure or are at risk of developing same. Even more particularly, the present invention provides a method of treating kidney failure or reducing the risk of developing kidney failure in a subject such as following or during or prior to sepsis or a related condition including severe sepsis, septic shock and the systemic inflammatory response syndrome or any state of systemic or renal vasodilatation with low blood pressure and a high cardiac output with kidney failure, such as liver disease with associated kidney failure or kidney failure after cardiopulmonary bypass in patients in whom the systemic inflammatory syndrome which follows such cardiopulmonary bypass is associated with a high cardiac output and systemic or renal vasodilatation or kidney failure in other conditions which lead to the systemic inflammatory response syndrome ...
Doctors help you with trusted information about Hirschsprung in Constipation: Dr. Selter on does hirschsprung disease cause failure to thrive: Cases for prolonged periods of time due to increased heart rate....High output heart failure but not in most cases.
Heart disease is the leading cause of mortality and one of the main causes of morbidity in beta-thalassemia. Patients with homozygous thalassemia may have either a severe phenotype which is usually transfusion dependent or a milder form that is thalassemia intermedia. The two main factors that determine cardiac disease in homozygous ? thalassemia are the high output state that results from chronic tissue hypoxia, hypoxia-induced compensatory reactions and iron overload. The high output state playing a major role in thalassaemia intermedia and the iron load being more significant in the major form. Arrhythmias, vascular involvement that leads to an increased pulmonary vascular resistance and an increased systemic vascular stiffness and valvular abnormalities also contribute to the cardiac dysfunction in varying degrees according to the severity of the phenotype. Endocrine abnormalities, infections, renal function and medications can also play a role in the overall cardiac function. For thalassaemia
RESULTS: A total of 312 patients (41% men, 59% women; mean age, 51 ± 18 years) with definite hereditary hemorrhagic telangiectasia were identified. Basal ganglia T1 hyperintensity was present in 23.4% of patients and demonstrated a statistically significant association with older age (P , .001), increased hepatic AVMs (P , .001), high cardiac output state (P , .001), hepatic failure (P = .01), elevated peak serum alkaline phosphatase level (P = .03), and increased total bilirubin count (P = .03). There was no significant association with sex, hereditary hemorrhagic telangiectasia genetic mutation status, parkinsonism, or serum transaminase levels. ...
Introduction: MitraClip therapy has become a therapeutic alternative for high surgical risk patients with symptomatic mitral regurgitation (MR). There are limited data about early and no data about later hemodynamic consequences after MR correction and about the impact of elimination of regurgitant flow on cardiac output state .. Methods: We studied invasive hemodynamic parameters before operation (conscious non-sedated patients, T1), immediately after MitraClip implantation (still under general anaesthesia, T2) and on day 1 (late) after procedure (conscious, extubated patients, T3) using right heart cathetrization.. Results: Of 25 MitraClip patients (72% male; mean age 70y) with functional MR, in 20 were performed invasive measurements in all time points. MitraClip implantation resulted in an increase in cardiac index (CI) from 1.8±0.5 (T1) to 2.4±0.5(T2) and to 3.2±0.5 L/min/m2 (T3), in a decrease in systemic vascular resistance index (SVRI) from 3759±847 (T1) to 2508±551 (T2) and to ...
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You also have the option to opt-out of these cookies. Hydrogen ion increases when CO 2 increases or during states of increased anaerobic metabolism, which can produce metabolic acidosis. Ive seen this theory applied mainly to anaerobic metabolism in skeletal muscle. These cookies will be stored in your browser only with your consent. Pulmonary artery pressure usually rises during acidosis. There are a number of factors which might be responsible for the development of this disorder. Here it will explain your question: Acidosis is caused by an accumulation of CO2 which combines with water in the body to produce carbonic acid, thus, lowering the pH of the blood. Acutely the acidosis will cause a right shift of the oxygen dissociation curve. 1 2 The hallmark of septic shock is marked peripheral arteriolar vasodilation, which results in low systemic vascular resistance, high cardiac output, severe hypotension, and inadequate tissue perfusion. Local effects of hypercarbia, and the resulting ...
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output, the thermistor catheter was connected to a microcom- Cardiac RNA analysis. Total RNA was isolated from the puter system (Lyons Medical Instrument) (26, 63). Isotonic ventricular samples using the RNeasy Maxi Kit (Qiagen) saline (0.1 ml) at room temperature was injected as a bolus according to the manufacturers instructions. Gene expres- via the jugular vein catheter. The thermodilution curve was sion analysis was performed using real-time RT-PCR (Taq- monitored by VR-16 Simultrace recorders (Honeywell, NY), Man) technology. RT-PCR was performed on 1 ng of total and cardiac output was digitally obtained by the microcom- RNA per reaction using the TaqMan sequence detector puter. Cardiac indexes were calculated as follows: stroke (model 7700, ABI-Perkin Elmer) (19). Amplification reaction volume ⫽ cardiac output/heart rate; cardiac index ⫽ cardiac conditions (for 50 ␮l) were 1⫻ TaqMan buffer A, 300 ␮M output/BW; stroke volume index ⫽ stroke volume/BW; and dATP, 300 ␮M dCTP, ...
A heart-lung preparation with flow limited to the coronary vessels was used to study cardiac performance 4 to 120 days after severe constriction of the abdominal aorta in rabbits. Cardiac performance was evaluated by finding the maximum mean arterial pressure against which the heart could pump. Cardiac performance began to exceed the normal, range by the second or third post operative week and was well above normal after the first month. A high cardiac performance was not necessarily associated with marked ventricular hypertrophy. Animals died of heart failure within the first month, and all had developed a much more rapid rate of blood pressure increase than those that survived without signs of decompensation. We conclude that the basic cause of heart failure after severe aorta constriction is a rapid rise in arterial pressure which exceeds the rate at which the heart develops an improved performance.. ...
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The Sprite Shower Filter Conservative calculations indicate that taking a shower exposes you to the equivalent of consuming an additional two liters of chlorinated water each day. Inhalation and skin absorption of chloroform and chlorine by-products is greatest in the shower, where these gases are vaporized. Combining
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The chip that I am using now is placed inside the PDMS chamber. I want to know how to design the DNA chip in order to save patient blood and have high output detection efficiency ...
It is a relatively low-cost investigation with a high diagnostic yield. The difference between soft and hard body parts stems ... These electron are then focus using electron lenses inside the intensifier to an output screen coated with phosphorescent ... The maximum range of a high-energy photon such as an X-ray in matter is infinite; at every point in the matter traversed by the ... The creation of images by exposing an object to X-rays or other high-energy forms of electromagnetic radiation and capturing ...
The mammal has a much higher peak output, but can only function over a very narrow range of body temperature. ... cardiac involuntary muscles.[68] The main structures of the heart are the sinus venosus, the pacemaker, the left atrium, the ... It is generally assumed that reptiles are unable to produce the sustained high energy output necessary for long distance chases ... Sustained energy output (joules) of a typical reptile versus a similar size mammal as a function of core body temperature. ...
Diet 1 and 2 were high carbohydrate (55% of total energy intake) *Diet 1 was high-glycemic index ... One of the most important things to take into consideration when either trying to lose or put on weight is output versus input ... as well as improved cardiac health.[24] ... Diet 3 was high-glycemic index. *Diet 4 was low-glycemic index ... Low-carbohydrate diets such as Atkins and Protein Power are relatively high in protein and fats. Low-carbohydrate diets are ...
In one series of famous experiments on the cardiac ganglion in lobsters, Bullock demonstrated that neurons can communicate not ... Bullock's life as a neuroscientist began with histological studies of brain degeneration that he performed while still in high ... which he used to explore the neural mechanisms that work together to produce an output in response to a stimulus, both at the ... Without due consideration of the neural and behavioral correlates of differences between higher taxa and between closely ...
Gas exchange is affected by increases in the dispersion of both alveolar ventilation and cardiac output because bronchial and ... overexpressing transgenic mice exposed to high dose doxycycline. Acute exposure to high concentrations of chlorine gas induces ... Inhalation of high doses of this gas causes lesions in the larynx, trachea, and large bronchi with inflammatory reactions and ... Exposure to high concentrations can cause bronchiolar and alveolar edema and airway destruction resulting in respiratory ...
Other factors affecting device longevity include programmed output and algorithms (features) causing a higher level of current ... The electrodes are placed in contact with the outer wall of the ventricle (epicardium) to maintain satisfactory cardiac output ... These studies demonstrated the restoration of heart rate, cardiac output and mean aortic pressures in animal subjects with ... Main article: Cardiac resynchronization therapy. Cardiac resynchronization therapy (CRT) is used for people with heart failure ...
Colloids preserve a high colloid osmotic pressure in the blood, while, on the other hand, this parameter is decreased by ... The best way to determine if a person will benefit from fluids is by doing a passive leg raise followed by measuring the output ... Advanced cardiac life support (ACLS). *Advanced trauma life support (ATLS). *Neonatal Resuscitation Program (NRP) ... A rapid infuser can be used if the patient requires a high flow rate and the IV access device is of a large enough diameter to ...
Charged particles such as protons and boron, carbon, and neon ions can cause direct damage to cancer cell DNA through high-LET ... Taylor CW, Nisbet A, McGale P, Darby SC (December 2007). "Cardiac exposures in breast cancer radiotherapy: 1950s-1990s". ... and fluence output rate (dose rate) of the medical linear accelerator. VMAT has an advantage in patient treatment, compared ... Auger therapy (AT) makes use of a very high dose[62] of ionizing radiation in situ that provides molecular modifications at an ...
... pilot utilizes the g-race suit interactively by muscle straining and breathing techniques to achieve an improved cardiac output ... High g is not comfortable, even with a g-suit. In older fighter aircraft, 6 g was considered a high level, but with modern ... A g-suit, or the more accurately named anti-g suit, is a flight suit worn by aviators and astronauts who are subject to high ... In addition, in some modern very high-g aircraft, the Anti-g suit effect is augmented by a small amount of pressure applied to ...
... factors decreases the contractile force that the myocardium must exert in order to achieve the same level of cardiac output. ... What you could see upon taking both medications at the same time, as caused by the much higher induction of relaxation of ... The potential for these contraindications and drug-drug interaction could lead to asystole and cardiac arrest. ...
The increase in salt and water retention caused by low cardiac output can also result in anasarca as a long term maladaptive ... In Hb Barts, the high oxygen affinity results in poor oxygen delivery to peripheral tissues, resulting in anasarca. ...
An output of one watt continuously for eighty years yields a total work output of two and a half gigajoules.[18] ... Cardiac muscle fibers are interconnected by intercalated discs,[12] giving that tissue the appearance of a syncytium. ... Once moved out of muscles with high concentrations within the sarcomere, lactic acid can be used by other muscles or body ... Estimates of the power output of the human heart range from 1 to 5 watts. This is much less than the maximum power output of ...
Part 8: Adult Advanced Cardiac Life Support: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and ... a higher level of training to operate, and typically cost hundreds to thousands of dollars more than a disposable manual ... one of the key advantages is that a direct air-tight passageway is provided from the output of the manual resuscitator to the ... leading to high probability of exposure), and (2) apparent inability for providers to protect patients from uncontrolled, ...
Relatively high-power devices such as hearing aids may use a zinc-air battery which have much higher capacity for a given size ... Silver cells may have a stable output voltage until it suddenly drops at end of life. This varies for individual types; one ... Artificial cardiac pacemaker. *Implantable cardioverter-defibrillator. ReferencesEdit. *^ a b BBC News:'Button battery' warning ... Examining datasheets for a manufacturer's range[4] may show a high-capacity alkaline cell with a capacity as high as one of the ...
Cardiac output is directly derived from heart rate and stroke volume of the blood;[69] an active microbat can reach a heart ... Insectivorous bats living at high latitudes have to consume prey with higher energetic value than tropical bats.[141] ... Larger bats tend to use lower frequencies and smaller bats higher for echolocation; high-frequency echolocation is better at ... In high-duty cycle echolocation, bats emit a continuous call and separate pulse and echo in frequency. The ears of these bats ...
... cardiac) than for β2 adrenoreceptors. Intravenous etilefrine increases the pulse rate, cardiac output, stroke volume, central ... Peripheral vascular resistance falls during the infusion of 1-8 mg etilefrine but begins to rise at higher dosage. Marked falls ... Intravenous infusion of this compound increases cardiac output, stroke volume, venous return and blood pressure in man and ... cardiac output, stroke volume and peripheral bloodflow, accompanied by rises in mean arterial pressure, occur when etilefrine ...
The rapid uncoordinated heart rate may result in reduced output of blood pumped by the heart (cardiac output), resulting in ... High blood pressure and valvular heart disease are the most common alterable risk factors for AF.[5][6] Other heart-related ... Due to inadequate cardiac output, individuals with AF may also complain of light-headedness,[23] may feel like they are about ... resulting in a severe reduction of cardiac output. This dangerous situation is prevented by the AV node since its limited ...
... but that the measured femoral and kidney fractions of cardiac output are respectively increased and reduced, suggesting that ... The risk of death in hepatorenal syndrome is very high; the mortality of individuals with type 1 HRS is over 50% over the short ... The risk of death in hepatorenal syndrome is very high; consequently, there is a significant emphasis on the identification of ... A transjugular intrahepatic portosystemic shunt (TIPS) involves the decompression of the high pressures in the portal ...
Total Peripheral Resistance = (Mean Arterial Pressure - Mean Venous Pressure) / Cardiac Output Therefore, Mean arterial ... At high heart rates M. A. P. {\displaystyle MAP}. is more closely approximated by the arithmetic mean of systolic and diastolic ... In medicine, the mean arterial pressure (MAP) is an average blood pressure in an individual during a single cardiac cycle.[1] ... Magder SA (2014). "The highs and lows of blood pressure: toward meaningful clinical targets in patients with shock". Crit. Care ...
Tissue hypoxia from low oxygen delivery may be due to low haemoglobin concentration (anaemic hypoxia), low cardiac output ( ... high altitude pulmonary edema (HAPE) and high altitude cerebral edema (HACE).[3] Hypoxia also occurs in healthy individuals ... "Effect of acute progressive hypoxemia on cardiac output and plasma excess lactate". Ann Surg. 177 (2): 199-202. doi:10.1097/ ... To counter the effects of high-altitude diseases, the body must return arterial pO. 2 toward normal. Acclimatization, the means ...
Since blood pressure is in intimate feedback with cardiac output and peripheral resistance, with relatively low blood pressure ... Elevated heart rate can result in significantly higher "cardiac work", which can result in symptoms of angina. ... He named this herbal drug "Zarnab" and used it as a cardiac remedy. This was the first known use of a calcium channel blocker ... By having both cardiac depressant and vasodilator actions, benzothiazepines are able to reduce arterial pressure without ...
Indeed, NIRS is able to measure venous oxygen saturation (SVO2), which is determined by the cardiac output, as well as other ... For high precision spectroscopy, wavelength-scanned lasers and frequency combs have recently become powerful sources, albeit ... examining the NIRS provides critical care physicians with an estimate of the cardiac output. NIRS is favoured by patients, ... Optical Coherence Tomography (OCT) is another NIR medical imaging technique capable of 3D imaging with high resolution on par ...
... the normal physiological response to low blood pressure in the renal arteries is to increase cardiac output (CO) to maintain ... Instead, extremely high levels of the precursor hormone corticosterone are produced, some of which is converted to 11- ... Another adrenal related cause is Cushing's syndrome which is a disorder caused by high levels of cortisol. Cortisol is a ... Few women of childbearing age have high blood pressure, up to 11% develop hypertension of pregnancy.[51] While generally benign ...
Gene product: Actin, alpha cardiac muscle 1, UniProtKB:P68032. GO term: heart contraction ; GO:0060047 (biological process). ... AmiGO Slimmer Archived 2011-09-29 at the Wayback Machine; maps granular annotations up to high-level terms ... means a human curator has reviewed the output from a sequence similarity search and verified that it is biologically meaningful ... the GO Consortium considers them to be marginally less reliable and they are commonly to higher level, less detailed terms. ...
Its actions are to increase peripheral resistance via α1 receptor-dependent vasoconstriction and to increase cardiac output via ... Because of the high intrinsic efficacy (receptor binding ability) of epinephrine, high concentrations of the drug cause ... "Part 6: Advanced Cardiovascular Life Support Section 6: Pharmacology II: Agents to Optimize Cardiac Output and Blood Pressure ... "High-dose epinephrine in adult cardiac arrest". The New England Journal of Medicine. 327 (15): 1045-50. doi:10.1056/ ...
... and cardiac output. ... higher spatial resolution images than SPECT (which has about 1 ... MPI is one of several types of cardiac stress test. A cardiac specific radiopharmaceutical is administered, e.g., 99mTc- ... Cardiac gated acquisitions are possible with SPECT, just as with planar imaging techniques such as multi gated acquisition scan ... Myocardial perfusion imaging (MPI) is a form of functional cardiac imaging, used for the diagnosis of ischemic heart disease. ...
... higher cardiac output, and disorders in blood-clotting that may lead to organ failure.[18] Fever is the most common presenting ... high blood lactate, or low urine output may suggest poor blood flow.[10] Septic shock is low blood pressure due to sepsis that ... Kidney: low urine output or no urine output, electrolyte abnormalities, or volume overload ... Dobutamine can also be used in hypotensive septic shock to increase cardiac output and correct blood flow to the tissues.[67] ...
For example, anger might be constituted by a certain set of physiological responses, such as increased cardiac output and high ... and cardiac output. Many indices are part of modern psychophysiology, including brain waves (electroencephalography, EEG), fMRI ... Psychologists are interested in why we may fear spiders and physiologists may be interested in the input/output system of the ... A positive control loop tends towards instability as player-software loop strives towards a higher standard of desirable ...
... increased cardiac output, vasodilation, sleep deprivation and malnutrition. Beverage-specific effects of additives or by- ... causing a higher buildup of acetaldehyde than normally seen in other groups.[13] The high concentration of acetaldehyde causes ... increased cardiac output, vasodilation, sleep deprivation and insufficient eating.[1] Some complex organic molecules found in ... High acetate levels cause adenosine to accumulate in many parts of the brain. But when the rats were given caffeine, which ...
OutputsEdit. See also: Neurotransmitter systems. This section needs expansion with: The list of outputs included here is not a ... "In Byrne, John H. Homeostasis and Higher Brain Function. Neuroscience Online. University of Texas Health Science Center at ... suggesting that the cardiac effects of orexin are mediated centrally. Consistently, microinjections of orexin-A into the ... Other output regions include: the ventromedial hypothalamus, medial and lateral septal nuclei, central medial amygdala, zona ...
... recently had a stress echo which found that with exercise my heart did not squeeze properly which looked like balanced cardiac ... Hi cardiac output could be caused by vitamin deficiencies, thyroid problems, multiple myeloma, pagets disease, arterio-venous ... I have strong family hx so I had a cath done which was normal with clean arteries,normal pressures,ef 55% but my cardiac output ... recently had a stress echo which found that with exercise my heart did not squeeze properly which looked like balanced cardiac ...
Systemic and regional hemodynamics in low, normal and high cardiac output borderline hypertension.. F H Messerli, J G De ... Systemic and regional hemodynamics in low, normal and high cardiac output borderline hypertension. ... Systemic and regional hemodynamics in low, normal and high cardiac output borderline hypertension. ... Systemic and regional hemodynamics in low, normal and high cardiac output borderline hypertension. ...
Weaning patients with high cardiac output state: influence on central venous pressure and right ventricular stroke work index. ... haemo-dynamic parameters during a weaning trial of a cohort of post-liver transplant patients with a high cardiac output (CO). ... Twenty-five patients were enrolled; all presented cardiac index , 4 l/min/m2. The following parameters were evaluated: heart ... The weaning from mechanical ventilation in patients with high CO, particularly post-liver transplant patients, induces a ...
High; High Cardiac Output. On-line free medical diagnosis assistant. Ranked list of possible diseases from either several ... Cardiac Output, High (High Cardiac Output). A state of elevated cardiac output due to conditions of either increased ... "Cardiac Output, High"Drugs, active principles and "Cardiac Output, High"Medicinal plantsQuestions and answers from other users ... In time, compensatory changes of the heart can lead to pathological form of high cardiac output and eventual heart failure. ...
High-Output Heart Failure. Topic Overview. High-output heart failure happens when the bodys need for blood is unusually high, ... Increased number of blood vessels requires increased cardiac output.. Related Information. *Heart Failure ... High-output heart failure occurs when the normally functioning heart cannot keep up with an unusually high demand for blood to ... High-output heart failure results in the same symptoms of heart failure, including fatigue and shortness of breath. ...
High blood pressure can certainly damage delicate lining of arteries and it is the repair process which causes arteriosclerosis ... The heart cannot cope with the stress put on to it, e.g. High blood pressure, Wikipedia:Thyrotoxicosis, aortic stenosis ( ... Retrieved from "" ...
If very extensive, multiple arteriovenous malformations may lead to a high-output cardiac failure, requiring treatment before ... Ketamine and Hypnomidate are best avoided because they can cause high blood pressure that is relatively contraindicated in ... Intracranial arteriovenous malformations are at risk of rupture if subjected to high swings in arterial blood pressure. ...
A Case of Femoral Arteriovenous Fistula Causing High-Output Cardiac Failure, Originally Misdiagnosed as Chronic Fatigue ... We report a case of an iatrogenic femoral arteriovenous fistula, causing worsening congestive cardiac failure, in a 34-year-old ...
High output cardiac failure and paradoxical pulmonary emboli secondary to aortocaval fistula ... High output cardiac failure and paradoxical pulmonary emboli secondary to aortocaval fistula ... 1Aintree Cardiac Centre, University of Hospital Aintree, Liverpool, UK. *. 2Department of Cardiology, Liverpool Heart and Chest ... Correspondence to Dr Aleem Khand, Aintree Cardiac Centre, University of Hospital Aintree, Longmoor lane, Liverpool L9 7AL, UK; ...
... ... High-output cardiac failure is a rare complication of hereditary hemorrhagic telangiectasia and can potentially be mistaken for ... We present a case of high-output cardiac failure because of large hepatic arteriovenous malformations, review the literature ... regarding the cardiac manifestations of the disease, and discuss the possible differential diagnoses. ...
What is Cardiac output, high? Meaning of Cardiac output, high medical term. What does Cardiac output, high mean? ... high in the Medical Dictionary? Cardiac output, high explanation free. ... cardiac output. (redirected from Cardiac output, high). Also found in: Dictionary, Thesaurus, Encyclopedia. output. [owt´poot] ... Cardiac output, high , definition of Cardiac output, high by Medical dictionary https://medical-dictionary.thefreedictionary. ...
Center directors reported bevacizumab to be effective, with 55% reporting significant improvement in cardiac index and HOCF ... symptoms in most patients treated with bevacizumab, although normalization of cardiac parameters was uncommon. Adverse events ... Systemic bevacizumab is a novel targeted anti-angiogenic therapy for high-output cardiac failure (HOCF) in hereditary ... From: Systemic bevacizumab for high-output cardiac failure in hereditary hemorrhagic telangiectasia: an international survey of ...
... patients with high output cardiac failure have normal cardiac function and decreased systemic vascular resistance, either ... High-output cardiac failure is a less common form of heart failure, and although it may sound contradictory at first, in the ... This activity reviews the cause, pathophysiology and presentation of high output heart failure and stresses the role of the ... Describe the presentation of high output heart failure.. *Summarize the treatment options for high output failure. ...
Learn about the normal output rate, how its measured, and causes of low cardiac output. ... Cardiac output is defined as the amount of blood your heart pumps. ... can cause high cardiac output.. High output also can happen when your body lacks enough oxygen-carrying red blood cells, a ... "Understanding Cardiac Output," "Why Measure Cardiac Output?". University of Mississippi Medical Center: "Control of Cardiac ...
... cardiac output is greatest during intense exercise and when a person is approximately in his 20s. The more intense the exercise ... What causes high LDL cholesterol levels?. A: Elevated low-density lipoprotein (LDL) cholesterol levels are primarily caused by ... Cardiac output is thought of by doctors as a combination of heart rate and stroke volume. Stroke volume is increased when the ... According to WebMD, cardiac output is greatest during intense exercise and when a person is approximately in his 20s. The more ...
X CARDIAC OUTPUT To determine a value for cardiac output one simply rearranges the equation to read: CARDIAC OUTPUT = VCQ 2 c v ... The cardiac output is then calculated as follows: Cardiac output = Quantity of dye injected Av[I] for duration of curve X ... 43 APPENDIX B MEASUREMENT OF CARDIAC OUTPUT There are several different ways of measuring cardiac output. The standard method, ... Physical characteristics were recorded before cardiac output measurements were initiated. Cardiac output was measured using two ...
... Academic Article ... cardiac output was improved with combinations of smaller tidal volumes and higher frequencies. Reducing respiratory compliance ... cardiac output may be improved with smaller tidal volumes during high frequency jet ventilation. ... Cardiac output was continuously measured with an electromagnetic flow probe placed around the aorta. Respiratory compliance was ...
The prognosis of VGA is usually poor, particularly in newborns with heart failure due to high-flow intracerebral shunt. Surgery ... "Vein of Galen Aneurysmal Malformation and High-output Cardiac Failure in a Newborn". Iranian Journal of Neonatology IJN, 10, 1 ... Saeidi, R., Mohammadzadeh, A., Shahfarhat, A., Birjandi, H. Vein of Galen Aneurysmal Malformation and High-output Cardiac ... Vein of Galen Aneurysmal Malformation and High-output Cardiac Failure in a Newborn. ...
VirtaMed Launches High-Fidelity Obstetric Ultrasound Simulators. Cyber Threats to The Healthcare Industry and How Managed IT ... Reliant® Noninvasive Cardiac Output Monitor Gets FDA OK. January 24th, 2008 Editors Anesthesiology, Cardiology, Critical Care, ... The NICOM® ICU (Intensive Care Unit) and CCU (Critical Care Unit) is a non-invasive Cardiac Output monitor based on ... The device promises the accuracy of measurements of cardiac output equal or better to traditional Swan-Ganz catheter. The ...
Cardiac output changes and cardiac output increment. In the high‐EDP subgroup, changing diastolic properties (α and β) to those ... Change in Cardiac Output After EDPVR Normalization in the High‐EDP Group. Diastolic dysfunction, which is the key ... Improved Diastolic Function Is Associated With Higher Cardiac Output in Patients With Heart Failure Irrespective of Left ... Improved Diastolic Function Is Associated With Higher Cardiac Output in Patients With Heart Failure Irrespective of Left ...
Anand, I. S.; Florea, V. G. (2001). "High Output Cardiac Failure". Current Treatment Options in Cardiovascular Medicine. 3 (2 ... In advanced cases, the disease may cause high-output cardiac failure and death. ... Vasodilation leading to decreased systemic vascular resistance, and high output heart failure[20] ... High mortality of salmon (Salmo salar) in the river Mörrumsån is reported, and the last years mammals like Eurasian Elk (Alces ...
High-output heart failure is a heart condition that occurs when the cardiac output is higher than normal due to increased ... High Output Cardiac Failure. Curr Treat Options Cardiovasc Med. 2001 Apr;3(2):151-159. PMID 11242561 Causes of High-Output ... Ultimately cardiac output can be reduced to very low levels. It may occur in situations with an increased blood volume, morbid ...
An improved apparatus and method for determining the cardiac output of a living subject. The improved apparatus generally ... Band-pass filters 1309 a, 1309 b comprising a low-pass filter with pole at 1.59 MHz and high-pass filter with pole at 9.72 kHz ... cardiac output is then determined using the measured cardiac stroke volume and cardiac rate from the ECG potential. ... determining cardiac stroke volume from the measured voltage; and determining cardiac output based on stroke volume and cardiac ...
Cardiac Output, High Cardiac Output, Low Device: minimally invasive cardiac output system consisting of arterial line sensor ... Cardiac Output, Low. Cardiac Output, High. Heart Diseases. Cardiovascular Diseases. Signs and Symptoms. ... Device: minimally invasive cardiac output system consisting of arterial line sensor and cardiac output bedside monitor (device ... Using Minimally Invasive Cardiac Output Data vs. Standard Care for Patients Emergently Admitted to the Intensive Care Unit Who ...
Values of PAP may be further increased by high cardiac output resulting from the AV access itself, worsened by commonly ... Systolic PAP equals cardiac output times pulmonary vascular resistance (PVR), (i.e., PAP = cardiac output × PVR). Increased ... Affected patients have significantly higher cardiac output. This syndrome is associated with a statistically significant ... These observations indicate a role for AV access-mediated elevations in cardiac output in the pathogenesis of PH. The ...
... cardiac output, stroke volume variability, left ventricular contractility, systemic vascular resistance, and central venous ... combined with high volume hemofiltration (HVHF) on the cardiopulmonary function and removal of inflammatory mediators in a ... CO: cardiac output, dPmax: left ventricular contractility index, NE: highest norepinephrine dose, fluid intake: fluid intake ... CRRT: continuous renal replacement therapy; HVHF: high volume hemofiltration; CO: cardiac output; HR: heart rate; dPmax: left ...
high haemoglobin transfusion trigger on cardiac output in patients undergoing elective vascular surgery: Post-hoc analysis of a ... We evaluated whether inadequate increase in cardiac output (CO) following haemodilution explains reduction in ScO 2 . ... Mean CO during surgery was numerically 7.3% higher in the low-trigger compared with the high-trigger group (mean difference, ... Lower or Higher Oxygenation Targets for Acute Hypoxemic Respiratory Failure. Publikation: Bidrag til tidsskrift › ...
Topic: High Cardiac Output related to pulse rate?. Replies: 18. Views: 1775. Re : High Cardiac Output related to pulse rate?. , ... Topic: High Cardiac Ouput. Replies: 11. Views: 773. Re : High Cardiac Ouput. Hi Shannon,. Keeping everything crossed for baby ... r,Here is a thread talking about high cardiac output and pulse rate, linking to other discussions in the forum:,br/, ,br/, ,URL ... t,Hi Erica,,br/, ,br/, I was on clomid for a while when TTC. My OB/GYN told me that it could thin out the uterine lining when ...
... that HHT patients can already have a high output cardiac state that enhances risks of cardiac compromise; and that in contrast ... Sixty-nine HHT patients received bevacizumab, 37 (50.6%) for high output cardiac failure/hepatic AVMs, and 32 (49.4%) for ... and high cardiac output secondary to hepatic AVMs [35], in some cases, reversing the need for liver transplantation [36, 37]. ... and/or or high output cardiac failure due to liver AVMs. As part of the advice of an HHT center of reference, potential risks ...
Signs of high-output heart failure. *. Cardiac arrhythmia (Supraventricular arrhythmias are more common, [eg, atrial flutter ... The highest likelihood of cardiogenic shock was in male patients with preexisting atherosclerotic or structural heart disease. ...
High-output cardiac failure Jod-Basedow phenomenon "Hyperthyroidism". July 2012. Archived from the original ... Use of higher doses of radioiodine reduces the number of cases of treatment failure, with penalty for higher response to ... A very high dose is often needed early in treatment, but, if too high a dose is used persistently, people can develop symptoms ... Nonetheless, high maternal FT4 levels during pregnancy have been associated with impaired brain developmental outcomes of the ...
... high blood pressure, high blood pressure hypertension, high blood pressure remedies, hypertension, hypotension, low blood ... But if you can manage your blood pressure before it gets too high and puts your heart at risk, you may be able to avoid a lot ... High blood pressure, also known as hypertension (See blood pressure chart below) is called the "silent killer" for a reason - ... of 130 mm Hg or higher and at least one risk factor for cardiovascular disease. The studys aim was to find out whether ...
The influence of high-frequency jet ventilation with varying cardiac- cycle specific synchronization on cardiac output in ARDS ... The influence of high-frequency jet ventilation with varying cardiac- cycle specific synchronization on cardiac output in ARDS. ... COc is a potentially valuable method to monitor sudden changes in cardiac output and facilitate attempts to maximize cardiac ... Continuous cardiac output (COc) was monitored during change of ventilator mode from CMV to fixed-rate HFJV to synchronized HFJV ...
  • The weaning from mechanical ventilation in patients with high CO, particularly post-liver transplant patients, induces a significant increase in RVSWI, and a decrease in CVP. (
  • The authors studied the changes in several haemo-dynamic parameters during a weaning trial of a cohort of post-liver transplant patients with a high cardiac output (CO). (
  • We report a case of an iatrogenic femoral arteriovenous fistula, causing worsening congestive cardiac failure, in a 34-year-old marathon runner. (
  • High-output cardiac failure is a rare complication of hereditary hemorrhagic telangiectasia and can potentially be mistaken for other entities. (
  • We present a case of high-output cardiac failure because of large hepatic arteriovenous malformations, review the literature regarding the cardiac manifestations of the disease, and discuss the possible differential diagnoses. (
  • High-output cardiac failure is a less common form of heart failure, and although it may sound contradictory at first, in the simplest form, it is still the heart's inability to provide sufficient blood for the body's demand. (
  • Most patients with heart failure are either classified as a systolic or diastolic dysfunction with increased systemic vascular resistance, however, patients with high output cardiac failure have normal cardiac function and decreased systemic vascular resistance, either secondary to diffuse arteriolar dilation or possible bypass of the arterioles and capillary beds, leading to activation of neurohormones. (
  • This activity reviews the cause, pathophysiology and presentation of high output heart failure and stresses the role of the interprofessional team in its management. (
  • Review the causes of high output failure. (
  • Describe the presentation of high output heart failure. (
  • Summarize the treatment options for high output failure. (
  • Sometimes, sepsis , your body's response to blood infections that can lead to a dangerous drop in blood pressure and organ failure, can cause high cardiac output. (
  • The prognosis of VGA is usually poor, particularly in newborns with heart failure due to high-flow intracerebral shunt. (
  • Vein of Galen Aneurysmal Malformation and High-output Cardiac Failure in a Newborn', Iranian Journal of Neonatology IJN , 10(1), pp. 86-88. (
  • Background Little is known regarding the impact of diastolic function on cardiac output ( CO ) in patients with heart failure, particularly in patients with lower ejection fraction. (
  • In advanced cases, the disease may cause high-output cardiac failure and death. (
  • High-output heart failure is a heart condition that occurs when the cardiac output is higher than normal due to increased peripheral demand. (
  • PMID 11242561 Causes of High-Output Heart Failure Healthwise Staff of WebMD. (
  • If you have high blood pressure or are heading in that direction, you should know that hypertension is among the primary enlarged heart causes, and a major risk factor for heart failure. (
  • Here, we present the case of a 32-year-old woman who underwent EVLT and was diagnosed subsequently with ipsilateral external iliac arteriovenous (AV) fistula and high-output cardiac failure. (
  • She was stabilized medically and treated surgically with a covered stent placed in the external iliac artery with complete resolution of the fistula and cardiac failure. (
  • In heart failure, the cardiac output is reduced and as the condition progresses, the body's tissues become filled with fluid. (
  • This swelling or congestion of the tissue spaces (fluid overload) is the reason why heart failure is also known as congestive heart (cardiac) failure. (
  • It is important to be familiar with the components and physiology of cardiac output in order to understand heart failure. (
  • None of the compensatory mechanisms can sustain the cardiac output over a prolong period of time and will eventually cause further damage to the heart and lead to heart failure. (
  • High-output heart failure happens when the body's need for blood is unusually high, so heart failure symptoms happen even though the heart is working well. (
  • High-output heart failure occurs when the normally functioning heart cannot keep up with an unusually high demand for blood to one or more organs in the body. (
  • There are a variety of conditions that can significantly increase the body's need for blood and oxygen, resulting in high-output heart failure. (
  • Although the causes of high-output heart failure are different from the cause of other types of heart failure, the end result is the same: Your heart isn't supplying enough blood to meet your body's needs. (
  • High-output heart failure results in the same symptoms of heart failure, including fatigue and shortness of breath. (
  • How does it cause high-output heart failure? (
  • Thyroxine may cause high output cardiac failure. (
  • Heart failure (HF) is a clinical syndrome with an increasing prevalence and a high morbidity and mortality rate. (
  • In extreme circumstances, this can cause high output congestive heart failure. (
  • Children present in a similar way to adults, but they may also present with high output cardiac failure if there is a high volume shunt, and they may rarely present with hydrocephalus. (
  • High Output Cardiac Failure in a Patient of Diffuse Hepatic Arteriovenous Malformation. (
  • Severe cardiac failure due to almost any other cause: decompensated cardiomyopathy, myocarditis (acute coronary syndrome with cardiogenic shock, profound cardiac depression due to drug overdose or sepsis). (
  • The other was in fulminating heart failure with clinical evidence of a low cardiac output but no peripheral oedema. (
  • Both patients responded dramatically to thiamine, and this emphasizes the importance of considering thiamine deficiency as a cause of heart failure even when the cardiac output is low. (
  • Key secondary endpoint(s) are routine (Local laboratory) dosage of standard cardiac Troponin I (cTnI) at D1 (24h) and D3 (72 h) post operatively, and also in case of any suspicion of Myocardial Infarction , Routine cardiac safety monitoring. (
  • High-dose intravenous thrombolytic therapy in acute myocardial infarction: efficiency, tolerance, complications and influence on left ventricular performance. (
  • Cardiac arrhythmia (Supraventricular arrhythmias are more common, [eg, atrial flutter and fibrillation], but ventricular tachycardia may also occur. (
  • This syndrome may include high cardiac output , tachycardia, low urine output, and low peripheral oxygen extraction. (
  • An electrical method and apparatus for stimulating cardiac cells causing contraction to force hemodynamic output during fibrillation, hemodynamically compromising tachycardia, or asystole. (
  • Non-cardiac surgery is associated with significant cardiac morbidity and mortality. (
  • Systolic PAP equals cardiac output times pulmonary vascular resistance (PVR), (i.e. (
  • In this high-risk cardiac surgery cohort, the use of inhaled milrinone was not associated with systemic hypotension but with a reduced pulmonary vascular resistance and prevention of the increase in right-sided cavity dimensions. (
  • Increased pulse pressure represents a hemodynamic stimulus for cardiac and vascular hypertrophy 1 and may reflect arterial stiffness and atherosclerotic disease. (
  • although autonomic regulation of pulmonary vascular resistance conductance has been emphasized, little attention has been paid to the possible contribution of the passive physical characteristics of the two circuits to pressure changes associated with variation in cardiac output. (
  • Our analysis indicates that the net cardiac shunt in the cane toad is predicted primarily by the physical, rather than physiological, characteristics of the parallel pulmonary and systemic vascular circuits. (
  • The parallel vascular arrangement of amphibian circulatory anatomy does not necessarily predict equal flow rates to each circuit but, rather, allows for a wide range of differential outputs. (
  • Autonomic regulation and passive properties of the vascular circuits can occur in concert with each other, but most studies have considered only direct autonomic regulation of vascular tone as the basis for net cardiac shunts (but see West and Smits, 1994 ). (
  • High salt consumption is associated with increased blood pressure (BP) and vascular stiffening due to altered endothelial and vascular smooth muscle cells (VSMCs) function and extended arterial wall fibrosis [ 4 , 5 , 6 ]. (
  • Mean arterial BP is a function of cardiac output (CO) and total peripheral vascular resistance (TPR). (
  • 10. Garcia-Monaco R, De Victor D, Mann C, Hannedouche A, Terbrugge K, Lasjaunias P. Congestive cardiac manifestations from cerebrocranial arteriovenous shunts. (
  • Structural defects associated with congenital heart disease primarily cause cardiac shunts or obstruction to blood flow. (
  • Net cardiac shunts in anuran amphibians: physiology or physics? (
  • In this study, we re-analysed three recent studies that recorded net cardiac shunts in the cane toad ( Rhinella marina ) under a variety of conditions and treatments. (
  • The new guidelines stem from the 2017 results of the Systolic Blood Pressure Intervention Trial (SPRINT), which studied more than 9,000 adults ages 50 and older who had systolic blood pressure (the top number in a reading) of 130 mm Hg or higher and at least one risk factor for cardiovascular disease. (
  • The purpose of this study is to evaluate if the continuous availability of minimally invasive cardiac output data during treatment in the intensive care unit (ICU) for hemodynamic instability, in comparison to standard of care will shorten the time needed to stabilize the patient. (
  • Currently, a practical, precise, minimally invasive way to measure cardiac output or heart function in children undergoing surgery does not exist. (
  • Tests were conducted over time intervals that ranged from 6 to 24 hours of continuous monitoring for the obtained instantaneous cardiac output for each minute. (
  • Continuous cardiac output (COc) was monitored during change of ventilator mode from CMV to fixed-rate HFJV to synchronized HFJV, then followed through progressive delays in jet triggering within the cardiac cycle during the synchronous HFJV mode. (
  • However, although its strong odor is readily identified, olfactory fatigue occurs at high concentrations and at continuous low concentrations. (
  • Gratz I, Kraidin J, Jacobi AG, deCastro NG, Spagna P, Larijani GE (1992) Continuous noninvasive cardiac output as estimated from the pulse contour curve. (
  • We hypothesize that using the FloTrac™ system to continuously monitor cardiac output, in addition to traditional vital signs, cardiovascular instability will be identified earlier and result in earlier intervention. (
  • Using indocyanine green techniques, we showed decreased cardiac index (CI) and increased total peripheral resistance (TPR) in LFP, increased CI and decreased TPR in HFP, and unchanged CI and TPR in NFP while subjects were supine compared with control subjects. (
  • Ultimately, both are the result of differences in autonomic regulation, one directly and the other mediated indirectly via autonomic control of cardiac output. (
  • Cardiac autonomic dysfunction is common in diabetes ( 14 ) and has been associated with low diastolic peak filling rates (PFR) ( 6 , 15 ) and impaired augmentation of LVEF during exercise ( 10 , 16 , 17 ). (
  • This study aimed to assess the effects of early fluid resuscitation (EFR) combined with high volume hemofiltration (HVHF) on the cardiopulmonary function and removal of inflammatory mediators in a septic shock swine model. (
  • Persistently low cardiac output predicts high mortality in newborns with cardiogenic shock. (
  • or = mL/min/kg) during the first 48 hours life, in newborns with cardiogenic shock due to perinatal asphyxia is associated with a significantly higher mortality. (
  • Values of PAP may be further increased by high cardiac output resulting from the AV access itself, worsened by commonly occurring anemia and fluid overload. (
  • This invention relates to electrodes, or catheters, and, more particularly, to unipolar electrodes adapted for use in combination with cardiac pacers for low power drain stimulation of a patient's heart. (
  • d) delivering electrical current pulses through the patient's body, via said electrodes after detecting tachyarrhythmia, at a rate between about 60 and 200 pulses per minute, said electrical current pulses having a voltage less than a normal defibrillation voltage level, to force contraction in the patient's heart and facilitate a minimum level of cardiac output until cessation of the tachyarrhythmia or until other medical intervention is provided. (
  • Linda's reply turned out to be the most definitive treatise on the subject of high-altitude physiology and decompression we've ever seen. (
  • This is also determined by the strength of the heart muscle to force out blood (myocardial contractility) and the elasticity of the arteries, particularly the aorta , which need to stretch and recoil to keep blood flowing (Windkessel effect discussed under cardiac output). (
  • Conclusions: This study demonstrates instantaneous variations in cardiac output in a human subject with fixed rates of HFJV near to the HR in humans. (
  • CONCLUSIONS: We have shown that during matched conditions and high calcium concentrations, the hemodynamic profiles of high dose predilution HDF and lowflux HD were similar. (
  • Low output also could happen after you've lost too much blood, had a severe infection called sepsis , or had severe heart damage. (
  • High-volume hemofiltration (HVHF) can be performed by increasing the amount of replacement fluid, thus improving the removal of soluble macromolecules. (
  • Comparison of predilution hemodiafiltration and low-flux hemodialysis at temperature-controlled conditions using high calcium-ion concentration in the replacement and dialysis fluid. (
  • The aim of this study was to compare the hemodynamics of high-dose predilution hemodiafiltration (HDF) and low-flux hemodialysis (HD), under matched conditions and using high calcium-ion concentration in the replacement/dialysis fluid. (
  • Automated Versus Manual Fluid Management for High Risk Abdominal Surgical Patient. (
  • Per Operative Fluid Optimisation Comparison of an Automated Closed-Loop System Versus Current Practice in High Risk Abdominal Surgical Patient. (
  • We investigated whether high early fluid input is associated with delayed cerebral ischemia (DCI), and if fluid input can be safely decreased using transpulmonary thermodilution (TPT). (
  • High early fluid input was associated with DCI. (
  • Cardiac dysfunction may result from abnormalities in intracellular calcium regulation, heart metabolism, contractile proteins, or remodeling of the extracellular matrix ( 1 , 12 , 13 ). (
  • We evaluated the accuracy, precision, responsiveness, and reliability of NICOM for detecting cardiac output changes. (
  • Cardiac output measured by NICOM had most often acceptable accuracy, precision, and responsiveness in a wide range of circulatory situations. (