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Clinical significance of cardiac murmurs: Get the sound and rhythm
Clinical significance of cardiac murmurs: Get the sound and rhythm

... ventricular filling often producing a louder third heart sound. Increased atrial pressures impede pulmonary blood flow. Therefore, clinical signs to be expected from severe mitral regurgitation are especially decreased performance with increased respiratory rates, excessive sweating and slower recov ...
Left ventricular hypertrophy in athletes
Left ventricular hypertrophy in athletes

... Furthermore, adolescent athletes have usually been participating in intensive exercise for a shorter duration. The sporting discipline is an important determinant of LVH in athletes. Athletes participating ultra-endurance sport with a high isotonic and isometric component such as rowing, canoeing, s ...
Mutations in SCN10A Are Responsible for a Large Fraction
Mutations in SCN10A Are Responsible for a Large Fraction

... syndromes (24). Informed consent was obtained from all patients upon referral to the Masonic Medical Research Laboratory for genetic testing, and patients were tracked anonymously. This study was approved by the regional institutional ethics review board and conducted according to Declaration of Hel ...
Left Ventricular Performance Assessed by
Left Ventricular Performance Assessed by

... an indirect carotid arterial pulse tracing were recorded echocardiogram on the mulsimultaneously withThethe mean rate of internal diameter tichannel recorder. (Vcf) was calculated using previously described shortening methods. A recently described radioisotope method for measuring left ventricular e ...
A caudorostral wave of RALDH2 conveys anteroposterior
A caudorostral wave of RALDH2 conveys anteroposterior

... Shortly after that, cells in the lateral mesoderm differentiate into endocardial and myocardial types that will organize the primitive circulatory pump: the heart tube. It is only after the basic circulatory plan is laid down, with separate conduits to and from tissues, that pumping from the heart i ...
a finite element model of the human left ventricular systole, taking
a finite element model of the human left ventricular systole, taking

... pumps blood at a rate varying from 5 to 25 litters per minute in a healthy, not particularly trained adult. Due to the importance of the heart to human health, it has been studied extensively by medical scientists. Especially in earlier times, however, many researches in cardiac physiology had an es ...
Developing Your WIDS/IntraLearn Course
Developing Your WIDS/IntraLearn Course

... These include smoking, HTN, obesity, hyperlipidemia, physical inactivity, stress and DM. They can be eliminated, modified and/or controlled to improve CV health. ...
pulse
pulse

... The diaphragm is positioned to make a tight seal against the client's skin. Enough pressure is exerted to complete the seal and should leave a temporary red ring on the client's skin when the diaphragm is removed. The bell is the cone-shaped portion of the chestpiece usually surrounded by a rubber r ...
Dilated Cardiomyopathy
Dilated Cardiomyopathy

... Left Ventricular Dysfunction (SOLVD)17 suggest that AfricanAmerican patients with HF may not benefit from commonly used doses of currently recommended therapies to the same extent as white patients, although unanimity of opinion does not exist with regard to this issue.18 In general, HF is more comm ...
Syncope in congestive heart failure
Syncope in congestive heart failure

... showed an enlarged heart and vascular redistribution. The echocardiogram showed a left ventricular ejection fraction of 35%. Coronary angiography revealed normal coronary arteries. Electrophysiology study was negative for inducible ventricular arrhythmias. This review addresses issues regarding the ...
Intracardiac Flow Patterns in Early Embryonic Life
Intracardiac Flow Patterns in Early Embryonic Life

... In another group of 22 embryos, all at H-H stages 1718, the studies were performed in the left lateral position. After exposure through the same shell window, the embryo was gently turned left side up with forceps, after removing the chorion and amnion. The dye solution then was injected into the sa ...
cardio what?. - Children`s Cardiomyopathy Foundation
cardio what?. - Children`s Cardiomyopathy Foundation

... a family or cousins in a family will have cardiomyopathy but no one else will have it. This fits with a pattern of inheritance known as autosomal recessive inheritance. Sometimes, only boys in a family will have cardiomyopathy. This fits with a pattern known as X-linked inheritance. It is not always e ...
Randomized, Double-Blind Placebo-Controlled Trial of
Randomized, Double-Blind Placebo-Controlled Trial of

... Sample size calculations for the primary outcome variable, time to development of any cardiovascular endpoint, were based on two-sided tests, with a signi~cance level of 5% and a power of 80%. It was calculated that 144 patients, with 72 in each group, would be necessary to demonstrate a 20% differe ...
Cardiovascular Biomechanics
Cardiovascular Biomechanics

... n Mathematical relationship between pressure and flow. Cardiovascular Biomechanics, Spring 2004 ...


... and composition of the wall (7–9). They also examined dynamic factors that are intrinsic to the myocardium (i.e., the process of relaxation) as well as those extrinsic to the ventricle [i.e., the pericardium and the right ventricle (10, 11)]. Alterations in these factors, alone or in concert, could ...
Medical Percussion
Medical Percussion

Contractile properties of thermally acclimated trout heart
Contractile properties of thermally acclimated trout heart

... Rate dependence of isometric contractile force Mechanical restitution and rest-potentiation were determined to characterize the force–frequency relationship of trout atrial and ventricular muscle. Muscle preparations were stimulated at physiological heart rates at the acclimation temperatures of the ...
Comparison of ThreeDimensional Speckle Tracking
Comparison of ThreeDimensional Speckle Tracking

... Objective: Noninvasive accurate assessment of left atrial (LA) size and function is an essential requirement in daily clinical practice. Real time three-dimensional (3D) echocardiography (RT3DE) with direct volumetric method has been found to be a highly accurate and reproducible noninvasive tool fo ...
Electrophysiological Characteristics and
Electrophysiological Characteristics and

... low lateral wall to complete the flutter circuit. The mean TCL of reverse typical AFL was 226.5 ± 41.23 msec which was not different with that of typical AFL (p = 0.222). Meanwhile, the atypical AFL demonstrated much shorter TCL (195.4 ± 27.31 msec) and the CTI conduction was 110.5 ± 9.19 msec. The ...
Cardiac Magnetic Resonance Imaging in Oncology
Cardiac Magnetic Resonance Imaging in Oncology

... metastatic masses are approximately 40 times more prevalent than primary cardiac tumors.10,13,15 Cardiac MRI allows for accurate tissue characterization and localization of cardiac masses, and it can be used to help the health care professional determine the extent of involvement and functional impa ...
Therapeutic effect of MG132 on diabetic cardiomyopathy is
Therapeutic effect of MG132 on diabetic cardiomyopathy is

... dysfunction, including increased left ventricular systolic diameter and wall thickness and a decreased ...
an ultrasound technique Mitral valve movement - Heart
an ultrasound technique Mitral valve movement - Heart

... frequency of Iooo pulses/second. Ultrasound cardiograph tracings were recorded either by direct polaroid photography from the oscilloscope of the instrument or by means of a multichannel photographic or direct writing recorder (mingograph). In the latter cases an analogue gate was used to isolate th ...
Effect of fasting and refeeding on the consequences of
Effect of fasting and refeeding on the consequences of

... We investigated the effects of 48 hours (h)-fasting followed by permanent coronary artery occlusion and 48 h-refeeding on the infarct size; ejection fraction; plasma creatine kinase activity; and levels of IL1-β, CINC 2α/β and IL-6, triglycerides, glycogen and ATP in the left ventricle of adult rats ...
Relation of Cardiac Surface QRST Distributions to Ventricular
Relation of Cardiac Surface QRST Distributions to Ventricular

... distributions was studied in eight pentobarbital-anesthetized dogs. Unipolar epicardial electrograms were recorded from 64 sites evenly distributed on the right and left ventricles. Localized areas of short repolarization properties were produced by directing five intensities of light onto the surfa ...
An Inverse Finite Element Method for Determining the
An Inverse Finite Element Method for Determining the

... curves. By using these outputs of published LV experimental data, the bulk modulus versus time curve is traced through inverse technique. Based on the obtained results, the repeated changes of myocardium tissue bulk modulus in the LV wall during cardiac cycle result in a highly efficient global func ...
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Electrocardiography



Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.
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