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.
Method in which prolonged electrocardiographic recordings are made on a portable tape recorder (Holter-type system) or solid-state device ("real-time" system), while the patient undergoes normal daily activities. It is useful in the diagnosis and management of intermittent cardiac arrhythmias and transient myocardial ischemia.
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.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
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 measurement of magnetic fields generated by electric currents from the heart. The measurement of these fields provides information which is complementary to that provided by ELECTROCARDIOGRAPHY.
Infections with bacteria of the genus BACTEROIDES.
Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.
Pressure, burning, or numbness in the chest.
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.
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
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 number of times the HEART VENTRICLES contract per unit of time, usually per minute.
Act of listening for sounds within the heart.
The hollow, muscular organ that maintains the circulation of the blood.
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.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752)
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)
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 heavy, bluish white metal, atomic number 81, atomic weight [204.382; 204.385], symbol Tl.
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.
Pathological conditions involving the HEART including its structural and functional abnormalities.
Monitoring of FETAL HEART frequency before birth in order to assess impending prematurity in relation to the pattern or intensity of antepartum UTERINE CONTRACTION.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The period shortly before, during, and immediately after giving birth.
The graphic recording of chest wall movement due to cardiac impulses.
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 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).
Simple rapid heartbeats caused by rapid discharge of impulses from the SINOATRIAL NODE, usually between 100 and 180 beats/min in adults. It is characterized by a gradual onset and termination. Sinus tachycardia is common in infants, young children, and adults during strenuous physical activities.
Transmission of the readings of instruments to a remote location by means of wires, radio waves, or other means. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The study of the heart, its physiology, and its functions.
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.
Abnormal cardiac rhythm that is characterized by rapid, uncoordinated firing of electrical impulses in the upper chambers of the heart (HEART ATRIA). In such case, blood cannot be effectively pumped into the lower chambers of the heart (HEART VENTRICLES). It is caused by abnormal impulse generation.
A 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)
A type of cardiac arrhythmia with premature contractions of the HEART VENTRICLES. It is characterized by the premature QRS complex on ECG that is of abnormal shape and great duration (generally >129 msec). It is the most common form of all cardiac arrhythmias. Premature ventricular complexes have no clinical significance except in concurrence with heart diseases.
The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.
Imaging of a ventricle of the heart after the injection of a radioactive contrast medium. The technique is less invasive than cardiac catheterization and is used to assess ventricular function.
A form of ventricular pre-excitation characterized by a short PR interval and a long QRS interval with a delta wave. In this syndrome, atrial impulses are abnormally conducted to the HEART VENTRICLES via an ACCESSORY CONDUCTING PATHWAY that is located between the wall of the right or left atria and the ventricles, also known as a BUNDLE OF KENT. The inherited form can be caused by mutation of PRKAG2 gene encoding a gamma-2 regulatory subunit of AMP-activated protein kinase.
A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.
An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation).
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 generic expression for any tachycardia that originates above the BUNDLE OF HIS.
The hospital department responsible for the administration and provision of diagnostic and therapeutic services for the cardiac patient.
Paramedical personnel trained to provide basic emergency care and life support under the supervision of physicians and/or nurses. These services may be carried out at the site of the emergency, in the ambulance, or in a health care institution.
A form of heart block in which the electrical stimulation of HEART VENTRICLES is interrupted at either one of the branches of BUNDLE OF HIS thus preventing the simultaneous depolarization of the two ventricles.
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.
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 form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION; (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY).
Unstable isotopes of thallium that decay or disintegrate emitting radiation. Tl atoms with atomic weights 198-202, 204, and 206-210 are thallium radioisotopes.
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.
Congenital, inherited, or acquired anomalies of the CARDIOVASCULAR SYSTEM, including the HEART and BLOOD VESSELS.
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.
Elements of limited time intervals, contributing to particular results or situations.
Impaired impulse conduction from HEART ATRIA to HEART VENTRICLES. AV block can mean delayed or completely blocked impulse conduction.
Systematic and thorough inspection of the patient for physical signs of disease or abnormality.
Examinations used to diagnose and treat heart conditions.
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.
Inflammation of the PERICARDIUM from various origins, such as infection, neoplasm, autoimmune process, injuries, or drug-induced. Pericarditis usually leads to PERICARDIAL EFFUSION, or CONSTRICTIVE PERICARDITIS.
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.
Heart sounds caused by vibrations resulting from the flow of blood through the heart. Heart murmurs can be examined by HEART AUSCULTATION, and analyzed by their intensity (6 grades), duration, timing (systolic, diastolic, or continuous), location, transmission, and quality (musical, vibratory, blowing, etc).
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.
Graphic registration of the heart sounds picked up as vibrations and transformed by a piezoelectric crystal microphone into a varying electrical output according to the stresses imposed by the sound waves. The electrical output is amplified by a stethograph amplifier and recorded by a device incorporated into the electrocardiograph or by a multichannel recording machine.
Abnormally rapid heartbeat, usually with a HEART RATE above 100 beats per minute for adults. Tachycardia accompanied by disturbance in the cardiac depolarization (cardiac arrhythmia) is called tachyarrhythmia.
X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.
Recording of regional electrophysiological information by analysis of surface potentials to give a complete picture of the effects of the currents from the heart on the body surface. It has been applied to the diagnosis of old inferior myocardial infarction, localization of the bypass pathway in Wolff-Parkinson-White syndrome, recognition of ventricular hypertrophy, estimation of the size of a myocardial infarct, and the effects of different interventions designed to reduce infarct size. The limiting factor at present is the complexity of the recording and analysis, which requires 100 or more electrodes, sophisticated instrumentation, and dedicated personnel. (Braunwald, Heart Disease, 4th ed)
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 abrupt cessation of all vital bodily functions, manifested by the permanent loss of total cerebral, respiratory, and cardiovascular functions.
A method of recording heart motion and internal structures by combining ultrasonic imaging with exercise testing (EXERCISE TEST) or pharmacologic stress.
Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure.
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.
A transient left ventricular apical dysfunction or ballooning accompanied by electrocardiographic (ECG) T wave inversions. This abnormality is associated with high levels of CATECHOLAMINES, either administered or endogenously secreted from a tumor or during extreme stress.
An autosomal dominant defect of cardiac conduction that is characterized by an abnormal ST-segment in leads V1-V3 on the ELECTROCARDIOGRAM resembling a right BUNDLE-BRANCH BLOCK; high risk of VENTRICULAR TACHYCARDIA; or VENTRICULAR FIBRILLATION; SYNCOPAL EPISODE; and possible sudden death. This syndrome is linked to mutations of gene encoding the cardiac SODIUM CHANNEL alpha subunit.
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.
A condition that is characterized by episodes of fainting (SYNCOPE) and varying degree of ventricular arrhythmia as indicated by the prolonged QT interval. The inherited forms are caused by mutation of genes encoding cardiac ion channel proteins. The two major forms are ROMANO-WARD SYNDROME and JERVELL-LANGE NIELSEN SYNDROME.
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.
Radiography of the heart and great vessels after injection of a contrast medium.
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.
Activities or games, usually involving physical effort or skill. Reasons for engagement in sports include pleasure, competition, and/or financial reward.
The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.
Application of computer programs designed to assist the physician in solving a diagnostic problem.
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.
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).
Agents used for the treatment or prevention of cardiac arrhythmias. They may affect the polarization-repolarization phase of the action potential, its excitability or refractoriness, or impulse conduction or membrane responsiveness within cardiac fibers. Anti-arrhythmia agents are often classed into four main groups according to their mechanism of action: sodium channel blockade, beta-adrenergic blockade, repolarization prolongation, or calcium channel blockade.
The chambers of the heart, to which the BLOOD returns from the circulation.
A republic in eastern Africa bounded on the north by RWANDA and on the south by TANZANIA. Its capital is Bujumbura.
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
A transferase that catalyzes formation of PHOSPHOCREATINE from ATP + CREATINE. The reaction stores ATP energy as phosphocreatine. Three cytoplasmic ISOENZYMES have been identified in human tissues: the MM type from SKELETAL MUSCLE, the MB type from myocardial tissue and the BB type from nervous tissue as well as a mitochondrial isoenzyme. Macro-creatine kinase refers to creatine kinase complexed with other serum proteins.
A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart.
A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external).
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.
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.
A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.
Tests used in the analysis of the hemic system.
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.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow.
A genus of fish, in the family GYMNOTIFORMES, capable of producing an electric shock that immobilizes fish and other prey. The species Electrophorus electricus is also known as the electric eel, though it is not a true eel.
PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.
Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.
Enlargement of the RIGHT VENTRICLE of the heart. This increase in ventricular mass is often attributed to PULMONARY HYPERTENSION and is a contributor to cardiovascular morbidity and mortality.
Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.
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.
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.
Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)
The creation and display of functional images showing where the blood is flowing into the MYOCARDIUM by following over time the distribution of tracers injected into the blood stream.
Studies determining the effectiveness or value of processes, personnel, and equipment, or the material on conducting such studies. For drugs and devices, CLINICAL TRIALS AS TOPIC; DRUG EVALUATION; and DRUG EVALUATION, PRECLINICAL are available.
Difficult or labored breathing.
A characteristic symptom complex.
Spasm of the large- or medium-sized coronary arteries.
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 distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.
Inflammatory processes of the muscular walls of the heart (MYOCARDIUM) which result in injury to the cardiac muscle cells (MYOCYTES, CARDIAC). Manifestations range from subclinical to sudden death (DEATH, SUDDEN). Myocarditis in association with cardiac dysfunction is classified as inflammatory CARDIOMYOPATHY usually caused by INFECTION, autoimmune diseases, or responses to toxic substances. Myocarditis is also a common cause of DILATED CARDIOMYOPATHY and other cardiomyopathies.
One of the three polypeptide chains that make up the TROPONIN complex. It inhibits F-actin-myosin interactions.
Measurable and quantifiable biological parameters (e.g., specific enzyme concentration, specific hormone concentration, specific gene phenotype distribution in a population, presence of biological substances) which serve as indices for health- and physiology-related assessments, such as disease risk, psychiatric disorders, environmental exposure and its effects, disease diagnosis, metabolic processes, substance abuse, pregnancy, cell line development, epidemiologic studies, etc.
A class of statistical procedures for estimating the survival function (function of time, starting with a population 100% well at a given time and providing the percentage of the population still well at later times). The survival analysis is then used for making inferences about the effects of treatments, prognostic factors, exposures, and other covariates on the function.
Services specifically designed, staffed, and equipped for the emergency care of patients.
Drugs used to cause dilation of the blood vessels.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
Centrifugation using a rotating chamber of large capacity in which to separate cell organelles by density-gradient centrifugation. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A set of techniques used when variation in several variables has to be studied simultaneously. In statistics, multivariate analysis is interpreted as any analytic method that allows simultaneous study of two or more dependent variables.
Pathological conditions involving any of the various HEART VALVES and the associated structures (PAPILLARY MUSCLES and CHORDAE TENDINEAE).
Contractile activity of the MYOCARDIUM.
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 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 hemodynamic and electrophysiological action of the right HEART VENTRICLE.
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.
Narrowing or constriction of a coronary artery.
Period of contraction of the HEART, especially of the HEART VENTRICLES.
Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
Pathological conditions involving the CARDIOVASCULAR SYSTEM including the HEART; the BLOOD VESSELS; or the PERICARDIUM.
Implantable devices which continuously monitor the electrical activity of the heart and automatically detect and terminate ventricular tachycardia (TACHYCARDIA, VENTRICULAR) and VENTRICULAR FIBRILLATION. They consist of an impulse generator, batteries, and electrodes.
The period following a surgical operation.
Disease having a short and relatively severe course.
Maleness or femaleness as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or effect of a circumstance. It is used with human or animal concepts but should be differentiated from SEX CHARACTERISTICS, anatomical or physiological manifestations of sex, and from SEX DISTRIBUTION, the number of males and females in given circumstances.
A method of comparing the cost of a program with its expected benefits in dollars (or other currency). The benefit-to-cost ratio is a measure of total return expected per unit of money spent. This analysis generally excludes consideration of factors that are not measured ultimately in economic terms. Cost effectiveness compares alternative ways to achieve a specific set of results.
The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition.
Statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable. A common application is in epidemiology for estimating an individual's risk (probability of a disease) as a function of a given risk factor.
The circulation of blood through the CORONARY VESSELS of the HEART.
Post-systolic relaxation of the HEART, especially the HEART VENTRICLES.
The probability that an event will occur. It encompasses a variety of measures of the probability of a generally unfavorable outcome.
Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
The veins and arteries of the HEART.
A class of statistical methods applicable to a large set of probability distributions used to test for correlation, location, independence, etc. In most nonparametric statistical tests, the original scores or observations are replaced by another variable containing less information. An important class of nonparametric tests employs the ordinal properties of the data. Another class of tests uses information about whether an observation is above or below some fixed value such as the median, and a third class is based on the frequency of the occurrence of runs in the data. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1284; Corsini, Concise Encyclopedia of Psychology, 1987, p764-5)
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
The hemodynamic and electrophysiological action of the HEART VENTRICLES.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.
Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.
Use of infusions of FIBRINOLYTIC AGENTS to destroy or dissolve thrombi in blood vessels or bypass grafts.
The restoration of blood supply to the myocardium. (From Dorland, 28th ed)
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.
Surgery performed on the heart.
The return of a sign, symptom, or disease after a remission.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment.
Hospital department responsible for the administration and provision of immediate medical or surgical care to the emergency patient.
Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.
Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (DC-shock) or alternating current at radiofrequencies (usually 750 kHz). The technique is used most often to ablate the AV junction and/or accessory pathways in order to interrupt AV conduction and produce AV block in the treatment of various tachyarrhythmias.
A medical specialty concerned with the provision of continuing, comprehensive primary health care for the entire family.
Statistical models used in survival analysis that assert that the effect of the study factors on the hazard rate in the study population is multiplicative and does not change over time.
A nonparametric method of compiling LIFE TABLES or survival tables. It combines calculated probabilities of survival and estimates to allow for observations occurring beyond a measurement threshold, which are assumed to occur randomly. Time intervals are defined as ending each time an event occurs and are therefore unequal. (From Last, A Dictionary of Epidemiology, 1995)
A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
The proportion of survivors in a group, e.g., of patients, studied and followed over a period, or the proportion of persons in a specified group alive at the beginning of a time interval who survive to the end of the interval. It is often studied using life table methods.
A group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to BRAIN ISCHEMIA or INTRACRANIAL HEMORRHAGES. Stroke is classified by the type of tissue NECROSIS, such as the anatomic location, vasculature involved, etiology, age of the affected individual, and hemorrhagic vs. non-hemorrhagic nature. (From Adams et al., Principles of Neurology, 6th ed, pp777-810)
Small-scale tests of methods and procedures to be used on a larger scale if the pilot study demonstrates that these methods and procedures can work.
Organized periodic procedures performed on large groups of people for the purpose of detecting disease.
The number of males and females in a given population. The distribution may refer to how many men or women or what proportion of either in the group. The population is usually patients with a specific disease but the concept is not restricted to humans and is not restricted to medicine.
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.
Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
The 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.
An infant during the first month after birth.
The presence of co-existing or additional diseases with reference to an initial diagnosis or with reference to the index condition that is the subject of study. Comorbidity may affect the ability of affected individuals to function and also their survival; it may be used as a prognostic indicator for length of hospital stay, cost factors, and outcome or survival.
The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.
Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.
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.

Heart rate variability and ischaemia in patients with coronary heart disease and stable angina pectoris; influence of drug therapy and prognostic value. TIBBS Investigators Group. Total Ischemic Burden Bisoprolol Study. (1/1346)

AIMS: Determination of the influence of therapy with bisoprolol and nifedipine on the heart rate variability of patients from the Total Ischemic Burden Bisoprolol Study and examination of the prognostic value. METHODS AND RESULTS: Four hundred and twenty-two patients with stable angina were included. The heart rate variability was determined over a period of 24 h. Parameters determined: standard deviation of the mean of all corrected RR intervals, standard deviation of all 5 min mean cycle lengths, square root of the mean of the squared differences of successive corrected RR intervals. Nifedipine reduced the mean values of all heart rate variability parameters tested. Square root of the mean of the square differences of successive corrected RR intervals increased under bisoprolol. Standard deviation of the mean of all corrected RR intervals and standard deviation of all 5 min mean cycle lengths increased from low baseline values and declined from higher baseline values. The increase in heart rate variability under therapy was accompanied by a tendency towards a better prognosis. Patients with an increase in heart rate variability and simultaneous complete suppression of ischaemia under therapy displayed no serious events in the course of one year. CONCLUSIONS: The increase in the heart rate variability, which can be regarded as prognostically favourable, was predominantly observed under bisoprolol. The parameter constellation of an increase in heart rate variability and complete ischaemia suppression on the 48-h Holter ECG was associated with the greatest benefit.  (+info)

Cardioprotection by opening of the K(ATP) channel in unstable angina. Is this a clinical manifestation of myocardial preconditioning? Results of a randomized study with nicorandil. CESAR 2 investigation. Clinical European studies in angina and revascularization. (2/1346)

AIMS: To assess the anti-ischaemic and anti-arrhythmic effects and overall safety of nicorandil, an ATP sensitive potassium (K+) channel opener, with 'cardioprotective' effects, in patients with unstable angina. METHODS: In a multicentre, randomized, double-blind, parallel-group, placebo-controlled study, oral nicorandil 20 mg twice daily or a matching placebo was administered for a minimum of 48 h to patients admitted with unstable angina. Treatment was standardized to include, where tolerated, oral aspirin, a beta-blocker and diltiazem. Continuous Holter ECG monitoring was performed for 48 h to assess the frequency and duration of transient myocardial ischaemia and any tachyarrhythmia, as the predefined end-points of the study. A pain chart recorded the incidence and severity of chest pain throughout the study period. Patients with myocardial infarction identified retrospectively from troponin-T analysis were excluded. RESULTS: Two hundred and forty-five patients were recruited into the study. Forty-three patients were excluded with an index diagnosis of myocardial infarction, two were not randomized and 12 had unsatisfactory tape data. In the remaining 188 patients, six out of 89 patients (6.7%) on nicorandil experienced an arrhythmia, compared with 17 out of 99 patients (17.2%) on placebo (P=0.04). Three nicorandil patients experienced three runs of non-sustained ventricular tachycardia compared to 31 runs in 10 patients on placebo (P=0.087 patients; P<0.0001 runs). Three nicorandil patients had four runs of supraventricular tachycardia, compared to 15 runs in nine patients on placebo (P=0.14 patients; P=0.017 runs). Eleven (12.4%) patients on nicorandil had 37 episodes of transient myocardial ischaemia (mostly silent) compared with 74 episodes in 21 (21.2%) patients on placebo (P=0.12 patients; P=0.0028 episodes). In the overall safety analysis, which included all patients who received at least one dose of study medication, there were no significant differences in the rates of myocardial infarction or death between the nicorandil or placebo-treated groups. CONCLUSIONS: Nicorandil, added to aggressive anti-anginal treatment for unstable angina, reduces transient myocardial ischaemia, non-sustained ventricular, and supraventricular arrhythmia compared to placebo. The anti-arrhythmic activity with nicorandil is probably a secondary effect resulting from its anti-ischaemic action and we suggest that this may be related to its effect on the ATP sensitive potassium channel causing pharmacological preconditioning.  (+info)

Early detection of anthracycline induced cardiotoxicity in asymptomatic patients with normal left ventricular systolic function: autonomic versus echocardiographic variables. (3/1346)

OBJECTIVE: To investigate left ventricular dysfunction in patients who had been treated with anthracycline based chemotherapy. METHODS: Autonomic function was compared with left ventricular diastolic function in 20 asymptomatic women with normal systolic function (left ventricular ejection fraction (LVEF) > 0.50) treated for breast cancer with high dose anthracycline based chemotherapy, and 20 age matched healthy controls. Left ventricular diastolic function was assessed echocardiographically by measuring the early peak flow velocity to atrial peak flow velocity ratio, isovolumic relaxation time, and deceleration time. Heart rate variability analysis was assessed for time domain and frequency domain parameters. RESULTS: The mean (SD) age of the patients was 45 (7) years and the mean LVEF was 0.59 (0.06). The time interval after the end of chemotherapy was 29 (27) months. One or more diastolic variables were abnormal in 50% of the patients. Heart rate variability was abnormal in 85% of patients. Mean values of both time domain and frequency domain parameters were decreased (p < 0.05), in particular the parasympathetic indices. CONCLUSIONS: Autonomic impairment occurs in a large proportion of asymptomatic patients with normal systolic left ventricular function after high dose anthracycline based chemotherapy. In particular, heart rate variability analysis may be a sensitive tool to identify the first signs of cardiotoxicity in these patients.  (+info)

Prognostic value of heart rate variability for sudden death and major arrhythmic events in patients with idiopathic dilated cardiomyopathy. (4/1346)

OBJECTIVE: This study was designed to evaluate the prognostic value of heart rate variability for sudden death, resuscitated ventricular fibrillation or sustained ventricular tachycardia in patients with idiopathic dilated cardiomyopathy. BACKGROUND: Previous studies have shown that heart rate variability could predict arrhythmic events and sudden death in postinfarction patients, but the prognostic value of heart rate variability for arrhythmic events or sudden death in patients with idiopathic dilated cardiomyopathy has not been established. METHODS: Time and frequency domain analysis of heart rate variability on 24-h electrocardiographic (ECG) recording was assessed in 116 patients with idiopathic dilated cardiomyopathy (91 men, aged 51+/-12 years, left ventricular ejection fraction 34+/-12%). RESULTS: Mean follow-up (+/-SD) was 53+/-39 months. Sixteen patients reached one of the defined study end-points (sudden death, resuscitated ventricular fibrillation or sustained ventricular tachycardia) during follow-up. Using multivariate analysis, only reduced standard deviation of all normal-to-normal intervals (SDNN) (p = 0.02) and ventricular tachycardia during 24-h ECG recording (p = 0.02) predicted sudden death and/or arrhythmic events. For SDNN, a cutoff level of 100 ms seemed the best for the risk stratification. CONCLUSIONS: Decrease in heart rate variability is an independent predictor of arrhythmic events and sudden death in idiopathic dilated cardiomyopathy, whether the mechanism of sudden death is ventricular tachyarrhythmia or not.  (+info)

Defibrillation-guided radiofrequency ablation of atrial fibrillation secondary to an atrial focus. (5/1346)

OBJECTIVES: Our aim was to evaluate a potential focal source of atrial fibrillation (AF) by unmasking spontaneous early reinitiation of AF after transvenous atrial defibrillation (TADF), and to describe a method of using repeated TADF to map and ablate the focus. BACKGROUND: Atrial fibrillation may develop secondary to a rapidly discharging atrial focus that the atria cannot follow synchronously, with suppression of the focus once AF establishes. Focus mapping and radiofrequency (RF) ablation may be curative but is limited if the patient is in AF or if the focus is quiescent. Early reinitiation of AF has been observed following defibrillation, which might have a focal mechanism. METHODS: We performed TADF in patients with drug-refractory lone AF using electrodes in the right atrium (RA) and the coronary sinus. When reproducible early reinitiation of AF within 2 min after TADF was observed that exhibited a potential focal mechanism, both mapping and RF ablation were performed to suppress AF reinitiation. Clinical and ambulatory ECG monitoring was used to assess AF recurrence. RESULTS: A total of 44 lone AF patients (40 men, 4 women; 32 persistent, 12 paroxysmal AF) with a mean age of 58+/-13 years underwent TADF. Sixteen patients had early reinitiation of AF after TADF, nine (20%; 5 paroxysmal) exhibited a pattern of focal reinitiation. Earliest atrial activation was mapped to the right superior (n = 4) and the left superior (n = 3) pulmonary vein, just inside the orifice, in the seven patients who underwent further study. At the onset of AF reinitiation, the site of earliest activation was 86+/-38 ms ahead of the RA reference electrogram. The atrial activities from this site were fragmented and exhibited progressive cycle-length shortening with decremental conduction to the rest of the atrium until AF reinitiated. Radiofrequency ablation at the earliest activation site resulted in suppression of AF reinitiation despite pace-inducibility. Improved clinical outcome was observed over 8+/-4 months' follow-up. CONCLUSIONS: Transvenous atrial defibrillation can help to unmask, map, and ablate a potential atrial focus in patients with paroxysmal and persistent AF. A consistent atrial focus is the cause of early reinitiation of AF in 20% of patients with lone AF, and these patients may benefit from this technique.  (+info)

Effects of paroxetine hydrochloride, a selective serotonin reuptake inhibitor, on refractory vasovagal syncope: a randomized, double-blind, placebo-controlled study. (6/1346)

OBJECTIVES: The purpose of the study was to determine whether the well tolerated serotonin reuptake inhibitor paroxetine hydrochloride could prevent vasovagal syncope in patients resistant to or intolerant of previous traditional therapies. BACKGROUND: Serotonergic mechanisms play a major role in the processes leading to neurocardiogenic vasovagal syncope, and serotonin reuptake inhibitors have been reported to be effective in preventing refractory syncope. METHODS: Sixty-eight consecutive patients (26 men and 42 women, mean age 44.7+/-16.5 years) with recurrent syncope and positive head-up tilt test and in whom standard therapies with beta-adrenergic blocking agents, vagolytic, negative inotropic or mineral corticoid agents were ineffectual or poorly tolerated were referred for study. Patients randomly received either paroxetine at 20 mg once a day or a placebo. A head-up tilt test was then reperformed after one month of treatment, and the clinical effect was noted over a mean follow-up of 25.4+/-7.9 months. RESULTS: The response rates (negative tilt test) after one month of treatment were 61.8% versus 38.2% (p < 0.001) in the paroxetine and placebo groups, respectively. During follow-up spontaneous syncope was reported in six patients (17.6%) in the paroxetine group as compared to 18 patients (52.9%) in the placebo group (p < 0.0001). Only one patient (2.9%) asked to be discontinued from the drug for severe side effects. CONCLUSIONS: Paroxetine was found to significantly improve the symptoms of patients with vasovagal syncope unresponsive to or intolerant of traditional medications and was well tolerated by patients.  (+info)

Prolonged QT interval in Rett syndrome. (7/1346)

Rett syndrome is a severe neurodevelopmental disorder of unknown aetiology. A prolonged QT interval has been described previously in patients with Rett syndrome. To investigate QT prolongation and the presence of cardiac tachyarrhythmias in Rett syndrome electrocardiography and 24 hour Holter monitoring were performed prospectively in a cohort of 34 girls with Rett syndrome. The corrected QT value was prolonged in nine patients. Compared with a group of healthy controls of a similar age range, the patients with Rett syndrome had significantly longer corrected QT values. Clinical severity was not a predictor for prolonged QT intervals in the Rett syndrome cohort. The prolonged QT syndrome is a serious and potentially lethal cardiac disorder and should be considered in all girls with Rett syndrome.  (+info)

Shift work-related problems in 16-h night shift nurses (1): Development of an automated data processing system for questionnaires, heart rate, physical activity and posture. (8/1346)

To assess the shift work-related problems associated with a 16-h night shift in a two-shift system, we took the following important factors into consideration; the interaction between circadian rhythms and the longer night shift, the type of morningness and eveningness experienced, the subjective sleep feeling, the subjects' daily behavior, the effectiveness of taking a nap during the long night shift, and finally the effectiveness of using several different kinds of measuring devices. Included among the measuring devices used were a standard questionnaire, repetitive self-assessment of subjective symptoms and daily behavior at short intervals, and a continuous recording of such objective indices as physical activity and heart rate. A potential problem lies in the fact that field studies that use such measures tend to produce a mass of data, and are thus faced with the accompanying technical problem of analyzing such a large amount of data (time, effort and cost). To solve the data analysis problem, we developed an automated data processing system. Through the use of an image scanner with a paper feeder, standard paper, an optical character recognition function and common application software, we were able to analyze a mass of data continuously and automatically within a short time. Our system should prove useful for field studies that produce a large amount of data collected with several different kinds of measuring devices.  (+info)

The 2016 Report on Holter Monitoring (Ambulatory Electrocardiography) Systems: World Market Segmentation by City The 2016 Report on Holter Monitoring (Ambulatory Electrocardiography) Systems: World Market - Market research report and industry analysis - 9137878
US Ambulatory Electrocardiography (ECG) Market Report: Industry Analysis & Outlook (2018-2022) by Koncept Analytics about US Ambulatory Electrocardiography (ECG) Market.
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Ive been feeling ill for a while, and my old, out of state, PCP thinks I probably have an autoimmune disease (most likely Sjogrens and RA or Lupus). I was having a lot of issues with dizziness, palpitations and difficulty breathing in December, and I wound up in the ER twice. The second time, they ordered a 48 hour Holter monitor, though I was only able to keep it on about 24 hours since I had an allergic reaction to the pads (both the plastic I started with and the cloth they were switched for). I have an appointment with a new PCP tomorrow, and Ill be talking with my old PCP by phone on thursday.... but I was wondering if anyone has any insight into my Holter monitor report ...
Effects of treatment strategies to suppress ischemia in patients with coronary artery disease: 12-week results of the Asymptomatic Cardiac Ischemia Pilot (ACIP) ...
Motwani, M; Maredia, N; Fairbairn, T A; Kozerke, S; Greenwood, J P; Plein, S (2014). Assessment of ischaemic burden in angiographic three-vessel coronary artery disease with high-resolution myocardial perfusion cardiovascular magnetic resonance imaging. European Heart Journal Cardiovascular Imaging, 15(6):701-708. ...
Over the last 10 years, the function and diagnostic capabilities of pacemakers and implantable cardioverter-defibrillators (ICDs) have become more complex. As a result, trouble-shooting device function and determining optimal device programming have become more challenging.. AECG is useful in assessing postoperative device function as well as in guiding appropriate programming of enhanced features such as rate responsivity and automatic mode switching. AECG can sometimes be a useful adjunct to continuous telemetric observation after pacemaker implantation in assessing device function and thereby can aid in determining the need for either device reprogramming or operative intervention. Present-generation pacemakers are capable of limited AECG monitoring function, which at the present time is not capable of entirely supplanting conventional AECG. They accomplish this through various algorithms by which complexes are classified according to whether or not they are preceded by atrial sensed or paced ...
Event monitoring is very similar to Holter monitoring, and is often ordered for the same reasons. With an event monitor, you wear ECG electrode patches on your chest, and the electrodes are connected by wire leads to a recording device. Unlike the Holter monitor, however, which records continuously throughout the testing period of 24 to 48 hours, the event monitor does not record until you feel symptoms and trigger the monitor to record your ECG tracing at that time. An auto-trigger event monitor may be used to record rhythms when symptoms are rare or suspected to occur during sleep. The auto-trigger event monitor automatically records rhythm events and also can be manually activated if you experience symptoms.. When you feel one or more symptoms, such as chest pain, dizziness, or palpitations, you push a button on the event monitor recorder. Some monitors have a feature (memory loop recorder) which captures a short period of time prior to the moment you triggered the recording and afterwards. ...
Press Release issued Jul 28, 2015: A new study Cardiac Event Ambulatory Monitor and Recorder Market Shares, Strategy, and Forecasts, Worldwide, 2012 to 2018. The 2012 study has 311 pages, 90 tables and figures. Worldwide markets are poised to achieve significant growth as event recorders find ways to support lowering the cost of care delivery by supporting shorter hospital stays and more home based services. New markets in clinical diagnoses and clinical studies are emerging as prices decrease and technology creates more advanced devices. Unit functions are being extended from direct arrhythmia symptom analysis to sleep studies and clinical drug efficacy studies creating significant growth opportunity.
Suzanne B. Knoebel, Task Force Member, Sankey V. Williams, James L. Achord, William A. Reynolds, Charles Fisch, Gottlieb C. Friesinger, Francis J. Klocke, Masood Akhtar, Thomas J. Ryan and Robert C. Schlant ...
A 12-page introduction on the method, with brief comments on diagnostic criteria and treatment, a bit more than 200 pages of illustrative cases (with brief history, tracings, questions, and discussion of diagnosis), and short appended tables summarizing diagnostic and therapeutic points. ...
Ambulatory electrocardiography, also called ambulatory ECG, ambulatory EKG, or a Holter monitor, is a battery-operated, portable device that measures and tape-records the hearts electrical activity (ECG) continuously, usually for a period of 24 to 48 hours so that any irregular heart activity can be correlated with a persons activity. The device uses electrodes or small conducting patches placed on the chest and attached to a small recording monitor that is carried in a pocket or in a small pouch worn around the neck. ...
Ambulatory EKG, also called ambulatory ECG, ambulatory electrocardiography, or a Holter monitor, is a battery-operated, portable device that measures and tape-records the hearts electrical activity (ECG) continuously, usually for a period of 24 to 48 hours so that any irregular heart activity can be correlated with a persons activity. The device uses electrodes or small conducting patches placed on the chest and attached to a small recording monitor that is carried in a pocket or in a small pouch worn around the neck. ...
The first 2 hours of ambulatory ECG recordings were processed for HRV. All ambulatory recordings included 2 channels of ECG information and were obtained on standard 4-track cassette tapes with the use of either a Cardiodata PR2 or PR3 pace recorder (Cardiodata Corp). The tape speed was 1 mm/s, and 1 channel was used to record a 32-Hz, crystal-controlled timing track. For analysis the tapes were played back at 120 times real time on the Cardiodata-ortara Mk5 Holter analysis system (Mortara Instrument Co), sampling each ECG channel at 180 samples/s. Beat-to-beat R-R interval data were obtained from the beat stream file. A linearly interpolated beat was substituted for intervals of ectopic beats or artifact less ≤2 R-R intervals. The fast Fourier transform was calculated on 100-second blocks of R-R interval data. A continuous curve was formed by linear interpolation between R-R intervals; this was subjected to a Hamming window and resampled at 1.28 times/s. If there was a run of arrhythmia or ...
Holter Monitor Information This test records your heart beats for a 24 hour period. It may be requested if you are experiencing irregular heart rhythms, pa
Make an appointment for the Holter Monitor Test with Dr. Roya Golshani if you have symptoms, such as irregular palpitations/ heartbeats, chest pain, and shortness of breath.
A Holter monitor is a machine that continuously records the hearts rhythms. The monitor is worn for 24 to 48 hours during normal activity.
A Holter monitor is a device that is worn for 24 to 48 hours and records a patients heart rate and rhythm. The patient should keep a diary of their activities and symptoms during this period. You will be asked not to remove the monitor or shower during this 24 to 48 hour period. It will take approximately 30 minutes … Read More. ...
This is the report from my Holter monitor. It looks good (I guess), but what would cause early beats? I do have panic - Answered by a verified Cardiologist
For many years I've gotten heart PACs. This was diagnosed with holter monitor and with a cardiologist- I also had an EKG - Answered by a verified Doctor
Holter Monitor answers are found in the Daviss Lab & Diagnostic Tests powered by Unbound Medicine. Available for iPhone, iPad, Android, and Web.
The Benefits Of Having A Home ECG Monitor. Home ECG monitor (electrocardiogram or EKG) offers many benefits beyond its bigger brother, the traditional 12-lead ECG machine. The personal ECG monitor are simple-to-use, convenient, and inexpensive. The monitoring can occur any time anywhere (home, office, car…) and measurements are available and recorded within minutes. The portable EKG machine is light and compact. Using it is simpler than taking ones blood pressure.. Cardiac events can occur randomly and not during the doctors office. By doing home ECG monitoring, the condition can be captured and saved for later analysis by a doctor. The best time to take a reading is when you are not feeling well and experienced some warning signs of heart attack.. When a patient is not feeling well, the patient and family can immediately take a reading using an ECG monitoring device, assess the situation and take appropriate actions. With the information, the patient may be persuade to seek medical help ...
If a patients symptoms suggest that an occasionally irregular heart rhythm may be causing their condition, their doctor may recommend the wearing of a Holter monitor. Over that time, the Holter monitor may be able to detect irregularities in the heart rhythm that an electrocardiogram couldnt detect.
Holter monitor. A portable device / examination for continuous monitoring of various electrical activity of the cardiovascular system for at least 24 hours. The Holter monitor records electrical signals from the heart via a series of electrodes attached to the chest. During…. A portable device / examination for continuous monitoring of various electrical activity of the cardiovascular system for at least 24 hours. The Holter monitor records electrical signals from the heart via a series of electrodes attached to the chest. During the examination the patient makes notes of his physical activity. When the recording of ECG is finished the physician performs the signal analysis and compares the recording with the patients notes. The extended recording period is useful for observing occasional cardiac abnormalities, e.g. arrhythmias which would be difficult to identify in a shorter period of time.. expand ...
RESEARCH DESIGN AND METHODS We prospectively enrolled 481 patients with type 2 diabetes who survived acute myocardial infarction (MI), were aged ≤80 years, and presented in sinus rhythm. Primary end point was total mortality at 5 years of follow-up. Severe autonomic failure (SAF) was defined as coincidence of abnormal autonomic reflex function (assessed by means of heart rate turbulence) and of abnormal autonomic tonic activity (assessed by means of deceleration capacity of heart rate). Multivariable risk analyses considered SAF and standard risk predictors including history of previous MI, arrhythmia on Holter monitoring, insulin treatment, and impaired left ventricular ejection fraction (LVEF) ≤30%. ...
The Heart Station, under the direction of Douglas Kopp, MD, provides a full range of electrocardiographic services for UW Hospital and Clinics, UW Clinics East and West, Atrium practice, and other regional clinics and out-of-state hospitals. Its services include electrocardiography, 24- and 48-hour ambulatory electrocardiography, electrocardiographic event recording, signal-average electrocardiography and exercise stress testing.
Fish oil on cardiovascular events study finds icosapent ethyl - an eicosapentaenoic acid (EPA) derivative, significantly reduces the risk of first, subsequent, and total ischemic events, including cardiovascular death, among patients with elevated triglycerides receiving statins. - Blackmores Institute
If your symptoms persist or theres a history of unexplained sudden death in your family, its important for your GP to refer you to a heart specialist (a cardiologist or electrophysiologist who specialises in heart rhythm disorders).. The most effective way to diagnose an arrhythmia is with an electrical recording of your heart rhythm called an electrocardiogram (ECG). If the ECG doesnt find a problem, you may need further monitoring of your heart. This may involve wearing a small portable ECG recording device for 24 hours or longer. This is called a Holter monitor or ambulatory ECG monitoring.. If your symptoms seem to be triggered by exercise, an exercise ECG may be needed to record your heart rhythm while you are using a treadmill or exercise bike.. You should request a copy of your ECG. Take it with you to see the cardiologist or heart rhythm specialist and always keep a copy for future use.. Other tests used in diagnosing arrhythmias include:. ...
If your symptoms persist or theres a history of unexplained sudden death in your family, its important for your GP to refer you to a heart specialist (a cardiologist or electrophysiologist who specialises in heart rhythm disorders).. The most effective way to diagnose an arrhythmia is with an electrical recording of your heart rhythm called an electrocardiogram (ECG). If the ECG doesnt find a problem, you may need further monitoring of your heart. This may involve wearing a small portable ECG recording device for 24 hours or longer. This is called a Holter monitor or ambulatory ECG monitoring.. If your symptoms seem to be triggered by exercise, an exercise ECG may be needed to record your heart rhythm while you are using a treadmill or exercise bike.. You should request a copy of your ECG. Take it with you to see the cardiologist or heart rhythm specialist and always keep a copy for future use.. Other tests used in diagnosing arrhythmias include:. ...
Salameh, A., Gebauer, R. A., Grollmuss, O., Vít, P., Reich, O., & Janoušek, J. (2008). Normal limits for heart rate as established using 24-hour ambulatory electrocardiography in children and adolescents. Cardiology in the Young, 18(5), 467-472 ...
Electrophysiology studies, electrocardiogram (ECG or EKG) and transesophogeal echocardiogram (TEE) measure the hearts electrical activity and identify muscle damage that can cause heart disease. Portable devices such as a Holter monitor or event recorder measure a patients heart activity throughout the day, over an extended period of time ...
The New Technology Used In The Cardiac Monitor. The standard cardiac monitor that has been available in the healthcare industry for years is designed to monitor the hearts activity. This includes the pulse rate as well as the rhythm. For those with cardiac disease as well as those who have recently had a heart attack or stroke, the monitor is used to let doctors find out what is going on. It can be used to catch problems early on and ensure that a person is getting the level of healthcare they need.. Traditionally, the cardiac monitor was a large machine that was found in hospitals as well as some doctor offices. When a person needed to be monitored, they were hooked up to the machine with a variety of leads. In many instances, the person would have to stay overnight at the hospital for monitoring. Between the equipment, the doctor visits, and the overnight, the bill would be very expensive.. Even those with health insurance would feel the financial burden because of the out of pocket expenses. ...
Dr. Bahman Omrani answered: PACs: In otherwise healthy individuals without structural heart disease PACs are almost always be...
The first thing my nurse practitioner did was run a bunch of blood tests. This ruled out iron deficiency, vitamin d (and maybe e?) deficiency, and anything related to glucose. At my next appointment, she sent me to have an EKG to get a baseline for my heart in preparation for a 48 holter monitor, which I did that same week. I pushed the button on the holter monitor a good 3-6 times per day for those 48 hours to record when I was symptomatic. Good news came back - my symptoms were not linked to any irregularities in my heart ...
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An ECG or EKG may allow you to see your patients heart activity, but it provides only a glimpse of a bigger picture. Because abnormal heart rhythms and cardiac symptoms come and go throughout the day, a singular test wont always show everything that is happening. In order to get the bigger picture, patients need to be recorded throughout an entire day. A holter monitor, or external electrocardiographic recording, is a battery-operated portable device that measures and records the hearts activity continuously for 24 hours. It is essentially a portable ECG that allows you to watch a patients heart rate in real time as he or she moves through the day. It has wires with small electrodes that attach to the skin, so it offers a non-invasive test that can yield insightful results.. With each test you run, your practice will earn $125 in reimbursement. The disposable parts cost just $6 for each test, so you still keep a significant profit. Each individual test takes 3 minutes to hook up to the ...
RRB NTPC 12th April Paper | Asked Questions 1st Shift (Morning Session) 2016 - Indian Railway Non Technical CBT Online Exam Solution (Morning Session)
Tapping into technology may help identify at-risk patients and better clarify poorly understood risk factors for this post-TAVR complication.
Dr. Frank Amico Sr answered: Yes : The QTC Intervals are measured by the requesting physician and often the Holter will also repo...
I told him about my strange heart feelings and he was the first one who didnt just shrug me off, tell me to monitor it, and basically look at me like I was crazy. I know that even my family thought I was crazy every time I kept bringing this issue up. Instead, he wanted to look further into it and ordered a 48-hour holter monitor for me to wear. Basically its an EKG machine light - a to-go version. I had five monitors stuck to me that connected to a recording device through a series of wires. The recorder clipped onto my pants top like a circa 1980s pager. It also came with a pocket size diary in which I was to record the time of day when I was having an episode so that they could look back and check what readings were happening at that time. I did everything as normal - Mexican dinner with my husband, happy hour at the outdoor Icehouse institution with Betts and Brenna. I just did it with a few extra parts attached ...
We use different tests and monitors to diagnose a heart rhythm irregularity, including Electrophysiology (EP) studies, Electrocardiogram (ECG or EKG), a Holter monitor and an event monitor or mobile cardiac outpatient telemetry (MCOT).
Holter monitoring gives doctors a constant reading of your heart rate and rhythm over a 24-hour period (or longer). The Holter monitor can record heart rate and rhythm when you feel chest pain or symptoms of an irregular heartbeat (called arrhythmia). Your doctor can then look at the time when you noticed your symptoms. Reading […]. ...
Dr. Vadim L. Madfis offers 24 hour heart monitoring and cardiac stress tests. Our practice serves the Jacksonville, Florida area.
I am 28 years old, about 140 pounds (although its dropping for some reason). I am a teacher, so I realize that the added stress most likely has something to do with it. I have stopped my intake of caffeine for a year and I have never smoked nor drank alcohol. I have gone to the hospital twice, both times with the result of not finding anything. My cardiologist cant seem to find anything either. I tried the holter monitor a day but that didnt pick anything up. The EKG readings at the hospital were fine too. The hospital tested the major diseases such as diabetes and high blood pressure, and those were fine as well ...
Question - Feeling very tired, lazy and dizzy. Heart starts beating fast and feeling weak. How to get cured?. Ask a Doctor about when and why Holter monitor is advised, Ask a Cardiologist
I had AFIB for maybe 7 years, with episodes 4-5 times a year, each lasting from 3 to 20 hours. They never caught it on the holter monitor ...
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Cardiovascular disease in general, and cardiac arrhythmias specifically, is common in great apes. However, the clinical significance of arrhythmias detected on short-duration electrocardiograms is often unclear. Here we describe the use of an implantable loop recorder to evaluate cardiac rhythms in 4 unanesthetized adult chimpanzees (Pan troglodytes), 1 with a history of possible syncope and 3 with the diagnosis of multiform ventricular ectopy (ventricular premature complexes) and cardiomyopathy. The clinical significance of ventricular ectopy was defined further by using the implantable loop recorder. Arrhythmia was ruled out as a cause of collapse in the chimpanzee that presented with possible syncope because the implantable loop recorder demonstrated normal sinus rhythm during a so-called syncopal event. This description is the first report of the use of an implantable loop recorder to diagnose cardiac arrhythmias in an unanesthetized great ape species ...
Due to the increasing emphasis on guiding patient management and revascularisation based on the extent rather than just the presence of ischaemia it is important to understand the relationship between parameters obtained in the catheter laboratory, such as luminal coronary artery stenosis, fractional flow reserve (FFR) and the extent of the ischaemic burden. Classic jeopardy scores estimate the area of myocardium at risk based on luminal stenosis severity without integrating their haemodynamic significance, whereas FFR assesses the impact of a stenosis on flow but is not influenced by the volume of subtended myocardium. Incorporating FFR measurements to a jeopardy score to produce a functional jeopardy score may provide a rapid method in the catheterisation laboratory to estimate ischaemic burden. The objective of this study is to assess the relationship between classical anatomical jeopardy scores, functional jeopardy scores (based on the combination of anatomical and haemodynamic data) and ...
What Holter, Event Loop Monitoring and Implantable Loop Recorders Are For Holter and event loop monitors are used to help detect a heart rhythm problem, such as a heart beat that is too fast, too slow or irregular. Holter monitors are portable devices that track your heart rhythm constantly for several days. The data it […]
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The technician will give you specific instructions on how to set up the Loop recorder monitor at home. ILRs can be active for up to 3-4 years, at which time you can choose to remove or leave the device under the skin.. A copy of the procedure and subsequent checks of the device information will be sent to your referring doctor and copies placed in your medical history.. Implantable loop recorders are routinely checked every 6 months. Peninsula Heart Centre will notify you if there are any heart rate or rhythm issues detected during the period of monitoring thereafter. ...
An implantable loop recorder (ILR), also known as an insertable cardiac monitor, is a small device about the size of a pack of chewing gum or USB memory stick that is implanted just under the skin of the chest for cardiac monitoring (that is, to record the hearts electrical activity). The ILR monitors the electrical activity of the heart, continuously storing information in its circular memory (the loop of the name) as electrocardiograms (ECGs). Abnormal activity such as arrhythmia (irregular heartbeats) is recorded by freezing a segment of the memory for later review. Typically, up to three episodes of abnormal activity can be stored, with the most recent episode replacing the oldest. Recording can be activated in two ways. First, recording may be activated automatically according to heart rate ranges previously defined and set in the ILR by the physician. If the heart rate drops below, or rises above, the set rates, the ILR will record without the patients knowledge. The second way the ...
PAN Czytelnia Czasopism, Heart rate turbulence in mild-to-moderate aortic stenosis in boxers - Polish Journal of Veterinary Sciences
In medicine, a Holter monitor (often simply Holter or occasionally ambulatory electrocardiography device) is a portable device for continuously monitoring various electrical activity of the cardiovascular system for at least 24 hours (often for two weeks at a time).. The Holters most common use is for monitoring heart activity (electrocardiography or ECG). Its extended recording period is sometimes useful for observing occasional cardiac arrhythmias which would be difficult to identify in a shorter period of time. For patients having more transient symptoms, a cardiac event monitor which can be worn for a month or more can be used.. The Holter monitor was developed at the Holter Research Laboratory in Helena Montana by experimental physicists Norman J. Holter and Bill Glasscock,[1] who started work on radiotelemetry in 1949. Inspired by a suggestion from nationally prominent cardiologist Dr Paul Dudley White in the early 1950s, they redirected their efforts toward development of a wearable ...
Background: Data on the value of baseline brain natriuretic peptide (BNP) and autonomic markers in predicting heart failure (HF) hospitalization after an acute myocardial infarction (AMI) are limited.. Methods: A consecutive series of patients with AMI without a previous history of HF (n = 569) were followed up for 8 years. At baseline, the patients had a blood sample for determination of BNP, a 24-hour Holter recording for evaluating heart rate variability (HRV) and heart rate turbulence (HRT), and an assessment of baroreflex sensitivity (BRS) using phenylephrine test.. Results: During the follow-up, 79 (14%) patients were hospitalized due to HF. Increased baseline BNP, decreased HRV, HRT, and BRS had a significant association with HF hospitalization in univariate comparisons (P , 0.001 for all). After adjusting with all the relevant clinical parameters, BNP, HRV, and HRT still significantly predicted HF hospitalization (P , 0.001 for BNP and for the short-term scaling exponent α1, P , 0.01 ...
BACKGROUND: A slower heart rate can exaggerate J-point elevation in a 12-lead ECG. This study examined the role of Holter monitoring in the diagnosis of early repolarisation pattern (ERP). METHODS: We examined 24-hour Holter recordings of 4000 consecutive patients seen at an outpatient clinic, and found 500 patients (12.5%) with ERP (based on J-point elevation magnitude maximum value≥0.1mV on the Holter recording). The highest magnitude of J-point elevation, R wave amplitude, the ratio between J-point elevation magnitude and R-wave amplitude on the same ECG lead (J/R ratio), QRS interval, and QT/QTc interval were measured on the Holter recording and on a surface 12-lead ECG of the 500 patients with ERP ...
Question - I recently had a myocardial perfusion scan and holter monitor - QY. Find the answer to this and other Medical questions on JustAnswer
Overall results: By increasing the detection rate of AF in patients with cryptogenic stroke by up to one third, CRYSTAL-AF and EMBRACE showed that long term heart rhythm monitoring is superior to conventional diagnostic methods that include 24 h ECG. These results confirm the findings of observational studies that had demonstrated a high rate of undetected AF in patients after cryptogenic stroke.. Monitoring device: The results of CRYSTAL-AF clearly showed a correlation between the duration of monitoring and an increased detection rate of AF for a period of up to 36 months. The detection rate of first episodes of AF increased from 8.9% after 6 months to 12.4% after 12 months up to 30.0% after 36 months in the intervention group. This seems to underline the need for a monitoring longer than the 3 months investigated in EMBRACE. Concerning extended monitoring a major advantage of an implanted device (CRYSTAL) compared to a noninvasive monitoring by belt (EMBRACE) is the straightforward possibility ...
With Schillers medilog electrocardiogram (ECG) Holter recorders and the new Fire of Life software, the heart rate variability (HRV) is analyzed and displayed in a new way to help judge the function of the autonomic nervous system. Viewing the Fire of Life demonstrates how well the human body reacts to stress and recovery and if repeated it can show if therapeutic actions or lifestyle changes are successful in reducing stress and improving recovery, which may open up new diagnostic possibilities.. Schiller is displaying this technology during the American College of Cardiology (ACC) 2013 meeting, March 9-11.. For more information: www.schilleramerica.com. ...
With Schillers medilog electrocardiogram (ECG) Holter recorders and the new Fire of Life software, the heart rate variability (HRV) is analyzed and displayed in a new way to help judge the function of the autonomic nervous system. Viewing the Fire of Life demonstrates how well the human body reacts to stress and recovery and if repeated it can show if therapeutic actions or lifestyle changes are successful in reducing stress and improving recovery, which may open up new diagnostic possibilities.. Schiller is displaying this technology during the American College of Cardiology (ACC) 2013 meeting, March 9-11.. For more information: www.schilleramerica.com. ...
There are some people who have abnormalities that will only be picked up when the heart is under stress. For example, if someone has a blocked artery then the heart will only complain when it is being challenged. So someone with a blocked artery will have a normal ECG when theyre lying down resting but when they exercise, the ECG may become abnormal. So if we suspect blocked arteries in someone, that is someone who is complaining of chest pain when they rush about, then we would perform an exercise stress test.. A 24 hour ECG is very useful at identifying individuals who have intermittent palpitation. A resting ECG at the time that the individual doesnt have any symptoms will be normal but a 24 hour ECG may pick up individuals who have intermittent palpitations and identify the rhythm disturbance in that individual.. ...
We intend to recruit 500 prevalent dialysis patients in 17 centers in Munich and the surrounding area. Baseline examinations include: (1) biochemistry, (2) 24-h Holter Electrocardiography (ECG) recordings, (3) 24-h ambulatory blood pressure measurement (ABPM), (4) 24 h pulse wave analysis (PWA) and pulse wave velocity (PWV), (5) retinal vessel analysis (RVA) and (6) neurocognitive testing. After 24 months biochemistry and determination of single PWA, single PWV and neurocognitive testing are repeated. Patients will be followed up to 6 years for (1) hospitalizations, (2) cardiovascular and (3) non-cardiovascular events and (4) cardiovascular and (5) all-cause mortality.. DISCUSSION/CONCLUSION ...
Cardiac arrhythmia monitoring devices market is set to surpass USD 9 billion by 2026, says latest research report by Global Market Insights, Inc. based on industry segment covering Devices (Holter Monitor, Event Recorder, Mobile Cardiac Telemetry, Implantable Cardiac Monitor, ECG Monitor), Application (Tachycardia, Bradycardia, Premature Contractions), and more.
Results In the PI arm 11.1% (n=99) had AbMI versus 6.9% (n=59) in primary PCI arm (p,0.01). In a multivariable model, AbMI patients overall had less baseline ΣST-deviation, fewer baseline Q-waves and shorter total ischaemic times. PI AbMI patients had faster time to TNK (90 vs 100 min, p=0.015): total ischaemic time was 100 min longer in primary PCI AbMI patients and no difference in ischaemic time existed between AbMI and non-AbMI patients within this group. Although no significant interaction between treatment and AbMI on the composite endpoint of death/shock/congestive heart failure/recurrent MI occurred (p=0.292), PI AbMI patients had a lower incidence in this endpoint than non-AbMI patients (5.1 vs 12%, p=0.038); this was not evident in primary PCI patients. Forty-five patients (ie, 2.5%) had masquerading MI with minimal biomarker elevation and no evolution in baseline ST-elevation.. ...
If your symptoms persist or theres a history of unexplained sudden death in your family, its important for your GP to refer you to a heart specialist (a cardiologist or electrophysiologist who specialises in heart rhythm disorders).. The most effective way to diagnose an arrhythmia is with an electrical recording of your heart rhythm called an electrocardiogram (ECG). If the ECG doesnt find a problem, you may need further monitoring of your heart.. This may involve wearing a small portable ECG recording device for 24 hours or longer. This is called a Holter monitor or ambulatory ECG monitoring.. If your symptoms seem to be triggered by exercise, an exercise ECG may be needed to record your heart rhythm while you are using a treadmill or exercise bike.. You should request a copy of your ECG. Take it with you to see the cardiologist or heart rhythm specialist and always keep a copy for future use.. Other tests used in diagnosing arrhythmias include:. ...
Our very special Dr. Djukic from Montefiore in New York suggested we get a test done on Annie - a 24 hour Holter monitor which is basically a 24 hour EKG of the heart. Girls with Rett Syndrome can sometimes have long QT wave which is when the resting period between heart beats is elongated. Weve been followed by a cardiologist since diagnosis, our appointments have gone from every 2 years to every year to every 6 months. Weve been skeptical, for sure, but when we have questioned about Annies heart everyone has always told us that everything is OK! Dr. Djukic suggested that Annies heart rate may be a little slow, in addition her breath holding due to apraxia was concerning thus the suggestion for the Holter monitor. So of course we jumped right on it and asked our cardiologist for a script. Annie was fitted yesterday ...
AliveCor says the US $199 / EUR 219 Kardiaband and US $99 / EUR 125 Kardiamobile are much cheaper than alternatives such as holter monitors (battery-operated portable devices that measure and record heart activity continuously for 24 to 48 hours) or implantable loop recorders. Kardia is also completely non-invasive and therefore far more convenient, and less obtrusive.. Running Kardias SmartRhythm monitoring on a 3rd-generation Apple Watch takes a heavy toll on the device battery, since it puts the watch into workout mode, which provides continuous heart-rate monitoring. Leaving it running reduced our Watch battery life to a day.. Taking an instant EKG is as easy as it could be - and discreet, too. Just start the Kardia app on Apple Watch, tap Record EKG, and place your thumb on the metal sensor in the band. After the near-instant signal detected notification, a 30-second EKG starts. If youd prefer to monitor for a longer period, that can be changed in the free iPhone app settings.. At the ...
Irregular and/or rapid beating of the heart called heart palpitations can occur in individuals without heart disease and the reasons for their palpitations are unknown. Together with heart palpitations silent arrhythmia may be present that could lead to serious complications (eg. stroke). In others, palpitations result from heart rhythm disturbances, sometimes life threatening. Standard diagnostic methods such as 24 hours Holter ECG monitoring or Event Holter do not guarantee early diagnosis of the arrhythmia. Prolonged heart rhythm recording and analysis using an automatic full disclosure telemetric device increase probability of arrhythmia diagnosis and early administration of applicable treatment. Study patients will be diagnosed using standard Holter ECG monitoring and 14 days telemetric full disclosure ECG monitoring. The full disclosure signal will be subsequently analyzed in the Event Monitoring mode by an independent consultant. Efficacy of Telemetric Monitoring in diagnosis of cardiac ...
Irregular and/or rapid beating of the heart called heart palpitations can occur in individuals without heart disease and the reasons for their palpitations are unknown. Together with heart palpitations silent arrhythmia may be present that could lead to serious complications (eg. stroke). In others, palpitations result from heart rhythm disturbances, sometimes life threatening. Standard diagnostic methods such as 24 hours Holter ECG monitoring or Event Holter do not guarantee early diagnosis of the arrhythmia. Prolonged heart rhythm recording and analysis using an automatic full disclosure telemetric device increase probability of arrhythmia diagnosis and early administration of applicable treatment. Study patients will be diagnosed using standard Holter ECG monitoring and 14 days telemetric full disclosure ECG monitoring. The full disclosure signal will be subsequently analyzed in the Event Monitoring mode by an independent consultant. Efficacy of Telemetric Monitoring in diagnosis of cardiac ...
Many Americans may have ischemic episodes without knowing it. These people have ischemia without pain - silent ischemia. They may have a heart attack with no prior warning. People with angina also may have undiagnosed episodes of silent ischemia. In addition, people who have had previous heart attacks or those with diabetes are especially at risk for developing silent ischemia ...
Patient characteristics: age: mean age 56 years; sex: 50% male; some patients with existing heart disease (40% had heart disease); TLoC history: mean 6.3 episodes in previous 12 months; mean duration 5.7 (8.9) years ...
It is crucial to realize that by virtue of its very definition, the HRV encompasses only oscillatory phenomena between heart beats resulting from the SA node depolarization [4,10]. While, ideally, all components of an R-R series originate from the SA node, the actual R-R series in both healthy and diseased subjects are contaminated by outliers due to artifacts and heart rhythm disturbances such as ectopic beats (ie, heart beats whose origin is outside of the SA node). Thus arises the necessity to ensure that the HRV analysis is performed on a series representing only the actual normal sinus rhythm (NSR) interbeat intervals, commonly referred to as N-N series (as in normal-to-normal).. The detrimental impact of ectopics on HRV measures is pronounced and well-documented [6,11-17]. In a recent study Stapelberg et al [18] examined the sensitivity of 38 time domain, frequency domain and nonlinear HRV measures to the addition of artifacts in real and artificial 24-hour recordings. In accordance with ...
An ECG or EKG may allow you to see your patients heart activity, but it provides only a glimpse of a bigger picture. Because abnormal heart rhythms and cardiac symptoms come and go throughout the day, a singular test wont always show everything that is happening. In order to get the bigger picture, patients need to be recorded throughout an entire day. A holter monitor, or external electrocardiographic recording, is a battery-operated portable device that measures and records the hearts activity continuously for 24 hours. It is essentially a portable ECG that allows you to watch a patients heart rate in real time as he or she moves through the day. It has wires with small electrodes that attach to the skin, so it offers a non-invasive test that can yield insightful results.. With each test you run, your practice will earn $125 in reimbursement. The disposable parts cost just $6 for each test, so you still keep a significant profit. Each individual test takes 3 minutes to hook up to the ...
oztechmuse (2323576) writes Samsung has just released an updated version of its health software for the Samsung Galaxy S5 that measures stress levels. Using the heart rate sensor on the back of the phone, the S5 will calculate a measure of stress from low to high. Although this may seem far-fetched...
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Low heart rate Soo.. Im 22wks and for the last few weeks my heart rate drops don to low 40s and my bp goes up. Ive been to my doctors and they have referred…
First, some quick background on me before I pose a question to all in this forum about low heart rate training, a la Maffetone and Mark Allen (and Hadd).... Ive run about 10 marathons, was stuck in the 3:08 range for a while before setting two consecutive PRs of 3:06 and 3:03 at the ages of 39 and 40. Im now 44, havent run another marathon since then, but am still dreaming of breaking 3:00 even at this advanced age.. A few years back I was introduced to Hadds methods, and found renewed hope in a training method that I hadnt tried yet. Unfortunately, I have not yet been able to complete the full Hadd program due to injuries and other factors. Im now back on track, nearing completion of Hadds Phase 1... my maximum HR is about 190, Im looking to run a marathon at an effort of between HR165 and HR170. Im currently feeling pretty comfortable at HR160, thinking another month or two before HR165-HR170 feels entirely comfortable. Right now, Im running right around 7:00 minute pace at HR165, so ...
The purpose of this work is to analyze the effect of selective atrial coronary artery occlusion on heart rate variability (HRV). Twelve-hour, Holter recording were studied in 109 patients undergoing elective percutaneous ...
Have recently had ECG done following chest pain.Tracing showed T wave inversion and ST wave inversion in lead 3. Have then had normal Echo, stress ECG and 24 hour Holter monitor. What could be the reas...
An electrocardiogram examines your heartbeat (how fast or how slow) and heart rhythm (steady or irregular), and the strength and timing of the electrical impulses that pass through your heart. EKGs are used to screen for various types of heart disease, such as heart attacks, arrhythmias (irregular heartbeats) and heart failure.. To perform an EKG, your doctor places small adhesive electrodes on the skin of your chest and other areas to record your hearts electrical activity. The test can also be done during exercise on a treadmill or exercise bike (exercise stress electrocardiogram).. Event and Holter Monitoring. Cardiac event monitors and Holter monitors are portable devices (worn under your clothes) that measure your hearts electrical activity throughout the day for a period of time. This allows your doctor to evaluate heart arrhythmias when they occur:. ...
RHYTHM HOLTER. It is the process of recording the electrical activity of the heart from three channels for at least 24 hours. According to the holter device used, the recordings taken to tape cassette or optical disc are analyzed by loading to a computer and it is possible to evaluate the heart rhythm and many parameters. Rhythm Holter examination is mostly performed to evaluate the problems in the electrical activity of the heart.. ...
From our site you can find out about the main tests and procedures used for the diagnosis of heart blocks - electrocardiography, Holter monitor, blood tests.
At the appt, the echo looked fine but we are now back on an arrythmia event recorder for a month. He had 2 drops just last night but neither was what I call symptomatic. Those are the worrisome ones where he actually grays a bit and seems not with it and then the more self corrected variety. So we have a new appendage. The poor kid is like a puppet on a string now. TOO MANY WIRES! They just want to take a look at our current status on his bradycardia events and also moniter for the strange Tachicardia we had last week when out of nowhere he sported a 256 for a few minutes. He did not look so good and his cardiologist said this is something we need to watch. If it stays that high over 5 minutes or is even less than that but is still elevated during an illness, he needs to be inpatient. This could be a sign of some new symptom or maybe it was a fluke..either way his heart should have stopped any messages telling it to jump that high. I am praying it was nothing. If not, there would be new issues ...
However the next year, the symptoms of congestive heart failure returned, and they did another MRI which revealed dysplasia of the right ventricle (not previously observed in the first MRI,) and enlargement. She was put on a diuretic which got her breathing and swelling back to normal, and then she had an electrophysiology study done on her heart function - testing and measuring responses to changes in the electrical conductivity of her heart, based on the suspicion that she had arrhythemogenic right ventricular dysplasia - it came up negative. As did a biopsy for distinctive morphological signs of ARVD. Multiple holter monitors for weeks and weeks also came up negative. Repeated years hence, also negative ...
An event recorder and an outward-facing camera in the front cab of the Hoboken train are trapped due to structural damage and unsafe asbestos levels.
Many Americans may have ischemic episodes without knowing it. These people have ischemia without pain - silent ischemia. They may have a heart attack with no prior warning. People with angina also may have undiagnosed episodes of silent ischemia. In addition, people who have had previous heart attacks or those with diabetes are especially at risk for developing silent ischemia ...
A low resting heart rate, which has been linked to aggression and violent offending, has been implicated in stalking behavior in males, according to a recent study.
Analysis of Holter Recordings In all three observation periods (baseline and at every 8 and 12 h) the Holter PVC rates used to determine efficacy of the
This mechanism of action study is to evaluate the effect of oral GS-6615 on the QTc interval in participants with Long QT-3 syndrome. This study will be performed in six cohorts of participants in a sequential manner, four single-dose cohorts followed by two multiple-dose cohorts. Duration of treatment for the single-dose cohorts and multiple-dose cohorts will be 1 day and 7 days, respectively. Participants will be confined at the study center from check-in until completion of assessments at discharge. Participants will be continuously monitored using real-time telemetry throughout the in-clinic confinement. Physical examinations including vital signs, laboratory analysis, electrocardiograms (ECGs), Holter recordings and echocardiography (ECHO) will be performed at defined time points throughout the study period. Assessment of adverse events and concomitant medications will continue throughout the duration of the study. ...
My PCP handed me my Holter report today and just said, make an appointment with a specialist in electrophysiology. So now I am a little concerned and it is causing me anxiety, my appointment with th...
Express Diagnostics offers national Holter Analysis Services to NHS GP Surgeries, CCGs and hospitals as well as private clinics and hospital groups.
Marriotts practical electrocardiography , Marriotts practical electrocardiography , کتابخانه دیجیتال دانشگاه علوم پزشکی اصفهان
Marriotts practical electrocardiography , Marriotts practical electrocardiography , کتابخانه دیجیتال جندی شاپور اهواز
Calvert CA; Jacobs GJ; Smith DD; Rathbun SL; Pickus CW (2000). "Association between results of ambulatory electrocardiography ...
"Association between results of ambulatory electrocardiography and development of cardiomyopathy during long-term follow-up of ...
Ambulatory telemetry can also be achieved by portable, battery-operated models which are carried by the patient and which ... which generally refers to continuous electrocardiography with assessment of the patients condition relative to their cardiac ... A small monitor worn by an ambulatory patient for this purpose is known as a Holter monitor. Cardiac monitoring can also ...
... is known as ambulatory electrocardiography (such as with a Holter monitor, wireless ambulatory ECG, or an implantable loop ... There are two types of cardiac monitoring that is covered by Medicare: Ambulatory electrocardiography (AECG): includes cardiac ... Cardiac monitoring with a small device worn by an ambulatory patient (one well enough to walk around) ... generally by electrocardiography, with assessment of the patient's condition relative to their cardiac rhythm. It is different ...
In medicine, a Holter monitor (often simply Holter) is a type of ambulatory electrocardiography device, a portable device for ... 12-lead Holter electrocardiography. Review of the literature and clinical application update. Su L1, Borov S, Zrenner B. ... When used to study the heart, much like standard electrocardiography, the Holter monitor records electrical signals from the ... Meldrum, Stuart J (1993). "Obituary for Wilford "Bill" Glasscock". Journal of Ambulatory Monitoring. 6 (3): 243. with the ...
... ambulatory MeSH E01.370.520.500.230 - electrocardiography, ambulatory MeSH E01.370.520.500.240 - esophageal ph monitoring MeSH ... electrocardiography, ambulatory MeSH E01.370.370.380.240.850 - vectorcardiography MeSH E01.370.370.380.240.850.100 - body ... electrocardiography, ambulatory MeSH E01.370.405.240.850 - vectorcardiography MeSH E01.370.405.240.850.100 - body surface ... ambulatory MeSH E01.370.370.150 - blood volume determination MeSH E01.370.370.170 - capillary fragility MeSH E01.370.370.380 - ...
Wireless ambulatory electrocardiography (ECG) is a type of ambulatory electrocardiography with recording devices that use ... Wireless Ambulatory ECGs work in a way similar to a regular ECG by measuring the electrical potential of the heart through the ... Wireless Ambulatory ECGs are able to provide voice alarm messages when cardiac abnormalities occur, such as bradycardia, and ... These characteristics of the devices are seen as benefits in comparison to current ambulatory ECG monitoring equipment such as ...
Roth has also applied the use of skin conductance, electrocardiography, actigraphy, and monitoring of other physiological ... as well as ambulatory monitoring of sleep. Core Concepts in Health by Paul M. Insel and Walton T. Roth (originally published ...
In 1998, he led the working team that defined the ISHNE ECG format from ambulatory ECG recordings. Notably, he was the lead ... He has made major contributions to noninvasive electrocardiography not only through his individual contributions, but also ... Badilini, Fabio; Maison-Blanche, P; Childers, R; Coumel, P (1999). "QT interval analysis on ambulatory electrocardiogram ... "QT interval analysis on ambulatory electrocardiogram recordings: a selective beat averaging approach". Med Biol Eng Comput. 37 ...
... monitor Cardiac cycle Electrocardiography Sinus rhythm Zhang GQ, Zhang W (2009). "Heart rate, lifespan, and ... "Electrocardiographic reference ranges derived from 79,743 ambulatory subjects". Journal of Electrocardiology. 40 (3): 228-34. ...
In the context of electrocardiography, the rate of the healthy heart is normally tightly controlled by the body's regulatory ... Analysis of time and frequency domain measures of heart rate (HR) variability from 24-hour ambulatory ECG recordings provides ...
In October 2014, The Lennar Foundation announced a $50 million naming donation for a new UHealth ambulatory services center ... and electrocardiography. The Interdisciplinary Stem Cell Institute (ISCI) and Dr. Joshua Hare are leading cutting edge medicine ...
... a notable contributor in specialties of electrocardiography, contrast visualization, and the dynamics of circulation and ... to practice and improve their clinical skills and professionalism through closely supervised rotations in both ambulatory and ...
Electrocardiography[edit]. ECG pattern in Brugada syndrome. According to consensus guidelines, Type 1 ST segment elevation, ... Ambulatory ECG monitoring, including implantation of a loop recorder, is sometimes used to assess whether dizziness or faints ...
Ambulatory Holter monitoring[edit]. A Holter monitor is a wearable ambulatory heart monitor that continuously monitors the ... American Heart Association Electrocardiography and Arrhythmias Committee and Exercise Cardiac Rehabilitation, and Secondary ... AF episodes may be detected and documented with the use of ambulatory Holter monitoring (e.g., for a day). If the episodes are ... "Screening for Atrial Fibrillation With Electrocardiography: US Preventive Services Task Force Recommendation Statement". JAMA ...
Accordingly, individuals with variant angina should be intermittently evaluated for this using long-term ambulatory cardiac ... of variant angina are chest pain that is concurrently associated with elevations in the ST segment on electrocardiography ...
Ambulatory blood pressure monitoring over a 24-hour period appears more accurate than office best blood pressure measurement. ... Upshaw, Charles (18 April 2007). "Henry J. L. Marriott: Lucid Teacher of Electrocardiography". Clinical Cardiology. 30 (4): 207 ... Preventive cardiology also deals with routine preventive checkup though non invasive tests specifically Electrocardiography, ... ECG interpretation and Practical Electrocardiography Bernard Lown (born 1921), original developer of the defibrillator Woldemar ...
"Effect of immunisation against angiotensin II with CYT006-AngQb on ambulatory blood pressure: a double-blind, randomised, ...
... regional anesthesiology/ambulatory anesthesiology, obstetric anesthesiology, or critical care medicine. Dental anesthesiology ... electrocardiography, electroencephalography, electromyography, entropy monitoring, neuromuscular monitoring, cortical ...
Electrocardiography Vectorcardiography. Holter monitor. Implantable loop recorder. Cardiac stress test Bruce protocol. ...
Not to be confused with Electroencephalography (EEG), Electrocardiography (ECG), Electronystagmography (ENG), ... Adult patient, equipped for ambulatory diagnosis. For the standard test, the patient comes to a sleep lab in the early evening ...
Electrocardiography Vectorcardiography. Holter monitor. Implantable loop recorder. Cardiac stress test Bruce protocol. ... 2008). Handbook of ambulatory anesthesia (2nd ed.). New York: Springer. p. 284. ISBN 978-0-387-73328-9. .. ... Outpatient surgery occurs in a hospital outpatient department or freestanding ambulatory surgery center, and the patient is ... London: International Association for Ambulatory Surgery. ISBN 978-989-20-0234-7. .. ...
Electrocardiography Vectorcardiography. Holter monitor. Implantable loop recorder. Cardiac stress test Bruce protocol. ...
Upshaw, Charles (18 April 2007). "Henry J. L. Marriott: Lucid Teacher of Electrocardiography". Clinical Cardiology. 30 (4): 207 ... Ambulatory blood pressure monitoring over a 24-hour period appears more accurate than office best blood pressure measurement.[ ... Henry Joseph Llewellyn "Barney" Marriott (1917-2007), ECG interpretation and Practical Electrocardiography[94] ... Preventive cardiology also deals with routine preventive checkup though non invasive tests specifically Electrocardiography, ...
Table2: Comparison of ambulatory blood pressures and urinary norepinephrine and epinephrine excretion measured at work, home, ... ease of use and applicability to ambulatory blood pressure or home blood pressure measurements have also influenced this trend. ... to advocate the use of ambulatory blood pressure as the preferred method for diagnosis of hypertension.[19] ... The variability in blood pressure and the better predictive value of ambulatory blood pressure measurements has led to some ...
These include electrocardiography (ECG), heart rate, blood pressure, inspired and expired gases, oxygen saturation of the blood ...
... electrocardiography (ECG), and others, represent other technologies that produce data susceptible to representation as a ... which may result from the circumstance that in Germany many x-rays are performed in ambulatory setting Medical images created ...
Monitors: electrocardiography, electroencephalography, electromyography, entropy monitoring, neuromuscular monitoring, cortical ... regional anesthesiology/ambulatory anesthesiology, obstetric anesthesiology, or critical care medicine.[26] ...
Electrocardiography Vectorcardiography. Holter monitor. Implantable loop recorder. Cardiac stress test Bruce protocol. ... Branch varicose veins are then usually treated with other minimally invasive procedures, such as ambulatory phlebectomy, ...
... electrocardiography (ECG), and others, represent other technologies that produce data susceptible to representation as a ... which may result from the circumstance that in Germany many x-rays are performed in ambulatory setting ...
... embedded into an electrocardiography monitor (12), which correlates syncope events and electrocardiographic data. Physiological ... 8. An ambulatory, extended-wear electrocardiography and syncope sensor monitor recorder (14) according to Claim 6, wherein: the ... An ambulatory, extended-wear electrocardiography and syncope sensor monitor (12) according to Claim 12, further comprising: a ... An ambulatory, extended-wear electrocardiography and syncope sensor monitor (12) according to Claim 12, further comprising: an ...
Ambulatory Electrocardiography.. Ann Intern Med. 1980;92:145. doi: 10.7326/0003-4819-92-1-145_4 ...
ACC/AHA Guidelines for Ambulatory Electrocardiography: Executive Summary and Recommendations. Michael H. Crawford, Steven J. ... ACC/AHA Guidelines for Ambulatory Electrocardiography: Executive Summary and Recommendations. Michael H. Crawford, Steven J. ... ACC/AHA Guidelines for Ambulatory Electrocardiography: Executive Summary and Recommendations. A Report of the American College ... "ACC/AHA Guidelines for Ambulatory Electrocardiography: Executive Summary and Recommendations: A Report of the American College ...
ACC/AHA guidelines for ambulatory electrocardiography. A report of the American College of Cardiology/American Heart ... Committee to Revise the Guidelines for Ambulatory Electrocardiography). Developed in collaboration with the North American ... Electrocardiography. The diagnosis of sinus node dysfunction (SND) in patients with suggestive symptoms is often made on the ... Ambulatory ECG (Holter) Monitoring and Event Recording. For patients with clinically suspected sinus node dysfunction (SND) in ...
Objective Despite the widespread and increasing use of ambulatory electrocardiography (ECG), there is no consensus on reference ... Articles reporting original data from ≥24-hour ambulatory electrocardiogram monitoring in healthy adults were included. Data ... Can you feel the beat? How to define reference ranges for ambulatory heart rhythm monitoring ... We sought to determine population distribution-based reference ranges for parameters measured during ambulatory ...
Indications for Ambulatory Electrocardiography (AECG). Update on Wednesday April 1st, 2020. by MedicalCRITERIA.com ... This entry was posted in Cardiology and tagged AECG, ambulatorio, Ambulatory, ecg, electrocardiografia, Electrocardiography, ... ACC/AHA Guidelines for Ambulatory Electrocardiography. A report of the American College of Cardiology/American Heart ... Committee to Revise the Guidelines for Ambulatory Electrocardiography). Developed in collaboration with the North American ...
Ambulatory Electrocardiography) Systems: World Market - Market research report and industry analysis - 9137878 ... Ambulatory Electrocardiography) Systems: World Market Segmentation by City The 2016 Report on Holter Monitoring ( ... The 2016 Report on Holter Monitoring (Ambulatory Electrocardiography) Systems: World Market Segmentation by City. This report ... The 2016 Report on Holter Monitoring (Ambulatory Electrocardiography) Systems: World Market Segmentation by City. Lowest Prices ...
... role of ambulatory monitoring and signal-averaged electrocardiography ... Greenberg, R.; Morganroth, J.; Zelenkofske, S.; Greenspon, A., 1992: Signal-averaged electrocardiography and ambulatory ... role of ambulatory monitoring and signal-averaged electrocardiography. Australian and New Zealand Journal of Medicine 16(5): ... years were investigated by 48-h continuous ambulatory electrocardiography and by the signal-averaging ECG according to Simson& ...
Clinical competence in ambulatory electrocardiography. Suzanne B. Knoebel, Task Force Member, Sankey V. Williams, James L. ... Clinical competence in ambulatory electrocardiography. Suzanne B. Knoebel, Task Force Member, Sankey V. Williams, James L. ... Clinical competence in ambulatory electrocardiography Message Subject (Your Name) has forwarded a page to you from JACC: ... Clinical competence in ambulatory electrocardiography. A Statement for physicians from the ACp/ACC/AHA task Force on clinical ...
Identification & Diagnosis: Electrocardiography. *Identification & Diagnosis: Ambulatory ECG recording. *Identification & ... Identification & Diagnosis: Electrocardiography. In patients with suspected atrial fibrillation based on an irregular pulse, ... Identification & Diagnosis: Ambulatory ECG recording. In patients with suspected intermittent atrial fibrillation, how ...
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Data Citation of the Topic Ambulatory electrocardiography. Copy and paste the following RDF/HTML data fragment to cite this ... Ambulatory electrocardiography,/a,,/span, - ,span property=offers typeOf=Offer,,span property=offeredBy typeof=Library ... Ambulatory electrocardiography,/a,,/span, - ,span property=offers typeOf=Offer,,span property=offeredBy typeof=Library ... Ambulatory electrocardiography. Local Identifier. http://engineerradcc.library.link/resource/PeSThO17wWo/ Network Identifier. ...
Make research projects and school reports about electrocardiography easy with credible articles from our FREE, online ... "acc/aha clinical competence statement on electrocardiography and ambulatory electrocardiography." journal of the american ... Electrocardiography Gale Encyclopedia of Medicine, 3rd ed. COPYRIGHT 2006 Thomson Gale. Electrocardiography. Definition. ... Electrocardiography Encyclopedia of Public Health COPYRIGHT 2002 The Gale Group Inc.. ELECTROCARDIOGRAPHY. The ...
Ambulatory ECG and Electrocardiography. Serial 24-hour ambulatory ECG monitoring was performed in all dogs. ECG monitoring was ... The ambulatory ECG data were subsequently used to group the animals according to the presence or absence of VT for comparison ... When the dogs were grouped into those with (n=6) and those without (n=5) evidence of VT on ambulatory ECG, there was a ... Ambulatory recordings were obtained with standard cassette recorders (Del Mar Avionics) and the XYZ lead configuration. The ECG ...
... by Koncept Analytics about US Ambulatory Electrocardiography (ECG) Market. ... US Ambulatory Electrocardiography (ECG) Market Report: Industry Analysis & Outlook (2018-2022) ... 2.4 The US Ambulatory ECG Market by Indication. 2.4.1 The US Ambulatory ECG Market by AF Symptoms 2.4.2 The US Ambulatory ECG ... Types of Ambulatory ECG. The US Ambulatory ECG Market by Volume (2013-2017). The US Ambulatory ECG Market Forecast by Volume ( ...
Device: Observational ambulatory ECG monitoring Study Design. Go to Study Description Study Design Groups and Cohorts Outcome ... A Study to Determine the Feasibility of Wireless Electrocardiography. The safety and scientific validity of this study is the ...
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... ambulatory electrocardiography) systems across the states, union territories and cities of India. - India market research ... This econometric study covers the latent demand outlook for Holter monitoring (ambulatory electrocardiography) systems across ... The 2016-2021 Outlook for Holter Monitoring (Ambulatory Electrocardiography) Systems in India. ... ambulatory electrocardiography) systems. This report does not discuss the specific players in the market serving the latent ...
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Electrocardiography and 24-h Ambulatory Electrocardiographic Monitoring. Furthermore, electrocardiography (ECG) and 24-h ... electrocardiography, 24-h ambulatory electrocardiographic monitoring and transthoracic echocardiography) as well as ... Savolainen A, Kuari M, Toivonen L, Kaitila I, Viitasalo M (1997) Abnormal ambulatory electrocardiographic findings in patients ... ambulatory electrocardiographic monitoring (Holter ECG) recording was analyzed. Among all the MFS patients, an increased number ...
Ambulatory electrocardiography; Electrocardiography - ambulatory; Atrial fibrillation - Holter; Flutter - Holter; Tachycardia ...
Ambulatory Electrocardiography Douglas W. Laidlaw, N. A. Mark Estes III. Pages 163-172 ... PET Cardiac Pacemaker Cardiac Radiology Cardiac Surgery Cardiology Coronary Angiography Echocardiogram Electrocardiography ...
Ambulatory electrocardiography; Electrocardiography (ECG) - ambulatory; Continuous electrocardiograms (EKGs); Holter monitors; ...
Ambulatory ECG, Ambulatory EKG, Echocardiography, echocardiogram, Computer Imaging, Tomography, CT, CAT scan, EBCT, PET, DCA, ... Ambulatory Electrocardiography and Holter Monitoring. (Also known as Holter Monitoring or Ambulatory ECG or Ambulatory EKG) ... Also known as Electrocardiography). What the Test Does. Records the electrical activity of the heart including the timing and ...
Using Ambulatory Electrocardiography During Recovery From Cardiac Surgery Marjorie Funk, RN, PhD; Marjorie Funk, RN, PhD ... Marjorie Funk, Sally Richards; Using Ambulatory Electrocardiography During Recovery From Cardiac Surgery. Crit Care Nurse 1 ...
  • All patients underwent complete clinical assessment including detailed medical history (with family medical history), physical examination with anthropometrics measurements, cardiac examination (electrocardiography, 24-h ambulatory electrocardiographic monitoring and transthoracic echocardiography) as well as ophthalmologic, orthopedic and genetic consultations. (springer.com)
  • Objective Despite the widespread and increasing use of ambulatory electrocardiography (ECG), there is no consensus on reference ranges for ambulatory electrocardiogram parameters to guide interpretation. (bmj.com)
  • We sought to determine population distribution-based reference ranges for parameters measured during ambulatory electrocardiogram in healthy adults, based on existing literature. (bmj.com)
  • Articles reporting original data from ≥24-hour ambulatory electrocardiogram monitoring in healthy adults were included. (bmj.com)
  • Conclusion Despite the limitations of existing published data, this meta-analysis provides evidence-based reference ranges for ambulatory electrocardiogram parameters and highlights significant age-dependent differences that should be taken into account during interpretation. (bmj.com)
  • The ST-segment of the ambulatory electrocardiogram in a normal population. (degruyter.com)
  • Physiological monitoring can be provided through a syncope sensor (64, 66) embedded into an electrocardiography monitor (12), which correlates syncope events and electrocardiographic data. (google.co.uk)
  • Forty-seven patients with HCM (31 male, 16 female, mean age 47 years) underwent continuous 24-hour ambulatory electrocardiographic (ECG) monitoring. (eurekamag.com)
  • This econometric study covers the latent demand outlook for Holter monitoring (ambulatory electrocardiography) systems across the states, union territories and cities of India. (marketreportsonindia.com)
  • Using econometric models which project fundamental economic dynamics within each state or union territory and city, latent demand estimates are created for Holter monitoring (ambulatory electrocardiography) systems. (marketreportsonindia.com)
  • Certified to perform exercise testing, holter monitoring, ambulatory blood pressure monitoring, and oxygen saturation is an asset. (workopolis.com)
  • The report "The US Ambulatory ECG Market: Industry Analysis & Outlook (2018-2022)" analyses the development of this market. (konceptanalytics.com)
  • The global market size of Ambulatory Services is $XX million in 2018 with XX CAGR from 2014 to 2018, and it is expected to reach $XX million by the end of 2024 with a CAGR of XX% from 2019 to 2024. (aarkstore.com)
  • 2. An ambulatory, extended-wear electrocardiography and syncope sensor monitor recorder (14) according to Claim 1, wherein the syncope sensor comprises at least one of a patient-mediated tactile feedback syncope button (66) and an actigraphy-based syncope sensor (64). (google.co.uk)
  • 3. An ambulatory, extended-wear electrocardiography and syncope sensor monitor recorder (14) according to Claim 2, wherein the syncope events comprise at least one of a syncope event identified by a patient (10,11) and a syncope event identified by the actigraphy-based syncope sensor (64) based on actigraphy filtering criteria comprising at least one of a falling event and a postural change event. (google.co.uk)
  • In most patients, ambulatory ECG monitoring for an extended period of time (typically 2-4 weeks but potentially longer) has the greatest yield and allows for correlation with symptoms. (medscape.com)
  • The Holter's most common use is for monitoring heart activity (electrocardiography or ECG) for observing occasional Cardiac arrhythmias which would be difficult to identify in a shorter period of time. (apollohospitals.com)
  • Serial 24-hour ambulatory ECG monitoring was performed in all dogs. (ahajournals.org)
  • Ambulatory ECG monitoring, which can be performed using a variety of techniques for as short as 24 to 48 hours and for as long as months to years, offers the opportunity to review cardiac ECG data during normal routine activity, including any physical and psychological stresses. (konceptanalytics.com)
  • Ambulatory ECG monitoring for longer periods (when compared with standard ECG for a 10-second time period) is more sensitive for detecting spontaneous, often highly variable cardiac arrhythmias or conduction abnormalities. (konceptanalytics.com)
  • Current ambulatory ECG monitoring technologies include traditional holter, event monitors, mobile cardiac outpatient telemetry (MCOT) and implantable loop recorders. (konceptanalytics.com)
  • This is known as ambulatory monitoring. (encyclopedia.com)
  • The purpose of this study is to determine, among a large cohort of 300 consecutive patients with hypertrophic cardiomyopathy, if extended ambulatory monitoring using the iRhythm Technologies, Inc. Zio XT device results in identifying a greater burden of nonsustained ventricular tachyarrhythmia (nsVT) compared to current ACCF/AHA guideline recommended 48-hour monitoring. (clinicaltrials.gov)
  • Total number of nsVT runs through 14 days of ambulatory cardiac monitoring, as compared to the first 48 hours. (clinicaltrials.gov)
  • Compare the number of nsVT runs detected between the first 48 hours vs 2 weeks of ambulatory cardiac monitoring. (clinicaltrials.gov)
  • Number of clinical management decisions based on 14 days of ambulatory cardiac monitoring, as compared to the first 48 hours ambulatory cardiac monitoring. (clinicaltrials.gov)
  • Compare the number clinical decisions based on the first 48 hours vs 14 days of ambulatory cardiac monitoring. (clinicaltrials.gov)
  • Ambulatory electrocardiography (ECG) allows for extended monitoring of arrhythmias in a real-world setting. (ccjm.org)
  • Ambulatory ECG monitoring is commonly used to correlate symptoms with arrhythmia, confirm occult atrial fibrillation, and assess the efficacy of antiarrhythmic therapy. (ccjm.org)
  • 5 , 6 The latest, published in 2017 by the International Society for Holter and Noninvasive Electrocardiology and Heart Rhythm Society, 6 divided indications for ambulatory cardiac monitoring into 3 broad categories: diagnosis, prognosis, and arrhythmia assessment ( Table 1 ). (ccjm.org)
  • An ambulatory patient monitoring system (100) is provided for measuring and storing predetermined diagnostic parameters of a patient. (google.com)
  • An electrocardiography (ECG) necklace has been developed to target the simultaneous monitoring of cardiac and physical activity in everyday life situations. (techbriefs.com)
  • Frequency response characteristics of ambulatory ECG monitoring systems and their implications for ST segment analysis. (springer.com)
  • Ambulatory heart rhythm monitoring. (mayoclinic.org)
  • Implications for ambulatory monitoring in angina pectoris. (degruyter.com)
  • At that point, all patients had electrocardiography, ambulatory blood pressure monitoring and orthostatic blood pressure measurements. (aafp.org)
  • Ambulatory cardiac monitoring is a way to watch and record the electrical activity of your heart. (memorialhospitaljax.com)
  • Ambulatory cardiac monitoring records your heart's electrical activity for long periods of time. (memorialhospitaljax.com)
  • Also may perform Signal Average ECGs, ambulatory blood pressure monitoring or educational instruction as needed by various departments within the enterprise. (americasjobexchange.com)
  • Monitoring can be classified by the target of interest, including: Cardiac monitoring, which generally refers to continuous electrocardiography with assessment of the patients condition relative to their cardiac rhythm. (wikipedia.org)
  • The USPSTF concludes that the current evidence is insufficient to assess the balance of benefits and harms of screening for atrial fibrillation with electrocardiography (ECG). (uspreventiveservicestaskforce.org)
  • To review the evidence on screening for nonvalvular atrial fibrillation with electrocardiography (ECG) and stroke prevention treatment in asymptomatic adults 65 years or older to inform the US Preventive Services Task Force. (uspreventiveservicestaskforce.org)
  • In contrast to the usual 12 lead ECG, where the heart's electrical signals are captured for only a few seconds, the continuous ambulatory ECG monitor can record such signals over a prolonged period at the patient's own home or work environment. (konceptanalytics.com)
  • However, the development of methods for the continuous recording and analysis of the ECG over prolonged periods of ambulatory activity can provide physiologic insight into cardiovascular responsiveness (Kligfield, 1984). (springer.com)
  • Prevalence and magnitude of S-T segment and T wave abnormalities in normal men during continuous ambulatory electrocardiography. (springer.com)
  • These advances, in addition to better signal quality and greater computer arrhythmia interpretation capabilities, have opened new potential uses for ambulatory electrocardiography (AECG). (ahajournals.org)
  • Electrocardiography serves as the gold standard for the noninvasive diagnosis of arrhythmias and conduction disturbances, and it occasionally is the only marker for the presence of heart disease. (medicalcriteria.com)
  • Signal-averaged electrocardiography in 27 patients showed late potentials in three of 11 patients with repetitive ventricular arrhythmias and was negative in 15 of 16 patients without these arrhythmias. (eurekamag.com)
  • Electrocardiography is a starting point for detecting many cardiac problems, including angina pectoris, stable angina, ischemic heart disease, arrhythmias (irregular heartbeat), tachycardia (fast heartbeat), bradycardia (slow heartbeat), myocardial infarction (heart attack), and certain congenital heart conditions. (encyclopedia.com)
  • Diagnosis of occult arrhythmias by Holter electrocardiography. (springer.com)
  • During his tenure with Wake Forest School of Medicine, he served as director of the Epidemiological Cardiology research center, a pioneering center in population electrocardiography and cardiovascular epidemiology in the United States. (aucegypt.edu)
  • This article reviews the currently available ambulatory ECG devices and their differences in design, function, indications, efficacy, cost, and optimal use in clinical practice. (ccjm.org)
  • The US ambulatory ECG market is set to experience favorable growth driven by factors such rising ageing population, increasing health care expenditure, accelerating economic growth, growing burden of atrial fibrillation and rise in prevalence of cardiovascular disorders. (konceptanalytics.com)
  • Doctors in Mayo Clinic's Cardiovascular Research Center study and adopt new techniques for and uses of electrocardiography. (mayoclinic.org)
  • Ambulatory electrocardiography, also called ambulatory ECG, ambulatory EKG, or a Holter monitor, is a battery-operated, portable device that measures and tape-records the heart's electrical activity (ECG) continuously, usually for a period of 24 to 48 hours so that any irregular heart activity can be correlated with a person's activity. (heart.org)
  • In addition pathologic ECG's and increased LV were more often to children who had the severe ambulatory hypertension comparing with the children who had the ambulatory hypertension during 24-h ABPM. (ktu.lt)
  • Many ambulatory devices are available, and choosing the optimal one requires an understanding of which features they have and which are the most appropriate for the specific clinical context. (ccjm.org)
  • Several guidelines have been published to help practitioners understand the available ambulatory ECG devices and their uses in clinical practice. (ccjm.org)
  • Global Ambulatory Services Market Report 2019 - Market Size, Share, Price, Trend and Forecast is a professional and in-depth study on the current state of the global Ambulatory Services industry. (aarkstore.com)
  • 5.The report estimates 2019-2024 market development trends of Ambulatory Services industry. (aarkstore.com)
  • For patients in whom sinus node dysfunction (SND) is clinically suspected but not confirmed by electrocardiography (ECG) and/or exercise stress test findings, a number of different modalities may be helpful. (medscape.com)
  • Students will explore ambulatory and exercise electrocardiography as well as ambulatory blood pressure recording. (swansea.ac.uk)
  • COCATS 4 Task Force 3: Training in Electrocardiography, Ambulatory Electrocardiography, and Exercise Testing. (bu.edu)
  • 6. Methods to detect ischemia using ambulatory (Holter) electrocardiography. (booktopia.com.au)
  • ACC/AHA guidelines for ambulatory electrocardiography. (aafp.org)
  • 7.The report makes some important proposals for a new project of Ambulatory Services Industry before evaluating its feasibility. (aarkstore.com)
  • In patients with suspected intermittent atrial fibrillation, how effective is ambulatory-ECG rather than event-ECG in diagnosis? (nih.gov)
  • To date, the evaluation of the prototype on eight epileptic patients has shown the potential for ambulatory seizure detection based on heart rate changes. (techbriefs.com)
  • Validation was performed against the reference standard 12-lead electrocardiography (ECG) in a separate cohort of patients undergoing cardioversion. (iclarified.com)
  • Electrocardiography is a commonly used, noninvasive procedure for recording electrical changes in the heart. (encyclopedia.com)
  • The ambulatory ECG records the electrical activity of heart while walking (ambulatory) and doing normal activities. (konceptanalytics.com)
  • In a patient with known structural or electrical heart disease, ambulatory ECG can be used to stratify risk. (ccjm.org)
  • Electrocardiography (also called EKG or ECG) is a test used to record electrical activity in the heart. (childrensdayton.org)
  • Portable (or ambulatory) ECG monitors help the doctor learn more about heart rhythm problems. (childrensdayton.org)
  • She is excited to be returning to outpatient primary care in General Internal Medicine, and will be seeing adults 18 years and over at the Ambulatory Care Center. (unc.edu)
  • The USPSTF found inadequate evidence to assess whether screening with electrocardiography identifies older adults with previously undiagnosed atrial fibrillation more effectively than usual care. (uspreventiveservicestaskforce.org)
  • In the ebook Long Term Ambulatory Electrocardiography, this exercises that the history simply is whether and how sexologists may find themselves. (polarismktg.com)
  • Students will explore electrocardiography and blood pressure recording in greater depth with a particular focus on differentiation of normal and abnormal findings. (swansea.ac.uk)
  • The ECG necklace is being evaluated for ambulatory detection of epileptic seizures overnight, in collaboration with Kempenhaeghe, an expertise center for epilepsy and sleep in the Netherlands. (techbriefs.com)
  • The imaging and histological studies were performed and analyzed without knowledge of previous findings from ambulatory ECG recordings, which were available for each animal. (ahajournals.org)
  • The ambulatory ECG data were subsequently used to group the animals according to the presence or absence of VT for comparison to the image findings. (ahajournals.org)
  • Predictive use of 24-hour electrocardiography in suspected Adams-Stokes syndrome: Comparison with cardiac rhythm during symptoms. (springer.com)
  • Corresponding to the chapters in Laboratory and Diagnostic Testing in Ambulatory Care, 4th Edition, this workbook provides practice designed to reinforce student understanding of laboratory concepts, terminology, and procedures. (elsevier.com)