On the Utility of T-Wave Amplitude
... about changes in TWA, the AVR lead is the only lead that is inconsistent with respect to polarity. Related to this confusion surrounding the generation of “opposite pictures of cardiac electrical events” is the statement that “if TWA attenuation occurs in AVR, TWA augmentation is likely to occur in ...
... about changes in TWA, the AVR lead is the only lead that is inconsistent with respect to polarity. Related to this confusion surrounding the generation of “opposite pictures of cardiac electrical events” is the statement that “if TWA attenuation occurs in AVR, TWA augmentation is likely to occur in ...
Increased Susceptibility of the Heart to Ventricular Fibrillation During
... variations in the electrical resistance of the system.2. 3 In the present work the duration of each stimulus was kept constant; the electrical resistance offered by the system, consisting of the electrodes, electrode-tissue interface and myocardium, was 50 to 85 ohms and remained essentially constan ...
... variations in the electrical resistance of the system.2. 3 In the present work the duration of each stimulus was kept constant; the electrical resistance offered by the system, consisting of the electrodes, electrode-tissue interface and myocardium, was 50 to 85 ohms and remained essentially constan ...
Full Text - Iranian Red Crescent Medical Journal
... heart. This hurtful cause could be within the heart or in its membrane or in the adjacent organs like brain, stomach, liver, lung, uterus, intestine or in the whole body that would contribute to distressing the heart .This sometimes comes from humor or non-humor substance, or simple dis-temperament ...
... heart. This hurtful cause could be within the heart or in its membrane or in the adjacent organs like brain, stomach, liver, lung, uterus, intestine or in the whole body that would contribute to distressing the heart .This sometimes comes from humor or non-humor substance, or simple dis-temperament ...
Sample pages 1 PDF
... chambers and great vessels, their location, and their mode of connection. Healthy subjects with usual connections (SVC and IVC → RA → RV → PA and PV → LA → LV → Ao3) present a right–left arrangement of cardiac chambers which is correlated with the thoracic and abdominal arrangement. Due to the orien ...
... chambers and great vessels, their location, and their mode of connection. Healthy subjects with usual connections (SVC and IVC → RA → RV → PA and PV → LA → LV → Ao3) present a right–left arrangement of cardiac chambers which is correlated with the thoracic and abdominal arrangement. Due to the orien ...
Homeotic Genes Autonomously Specify the
... portions, the aorta in the anterior and the heart in the posterior. The heart portion features a wider bore as compared with the aorta and develops inflow valves (ostia) that allow the pumping of hemolymph from posterior toward the anterior. Here, we demonstrate that homeotic selector genes provide ...
... portions, the aorta in the anterior and the heart in the posterior. The heart portion features a wider bore as compared with the aorta and develops inflow valves (ostia) that allow the pumping of hemolymph from posterior toward the anterior. Here, we demonstrate that homeotic selector genes provide ...
Relationship between Anemia and Diastolic Dysfunction of the Heart
... ventricular relaxation is more energy dependent than contraction, abnormalities of left ventricular diastolic function occur earlier than systolic dysfunction in virtually all cardiac diseases.[12] During the lag period between diastolic dysfunction pattern identified non-invasively via transthoraci ...
... ventricular relaxation is more energy dependent than contraction, abnormalities of left ventricular diastolic function occur earlier than systolic dysfunction in virtually all cardiac diseases.[12] During the lag period between diastolic dysfunction pattern identified non-invasively via transthoraci ...
Herz Significance of Late Gadolinium Enhancement in
... the no-reflow region depends on the time between contrast injection and imaging and is larger when imaging is started early. Another special situation is diffuse plexiform fibrosis, which does not lead to detectable LGE for two reasons. First, the new optimized segmented inversion recovery sequence ...
... the no-reflow region depends on the time between contrast injection and imaging and is larger when imaging is started early. Another special situation is diffuse plexiform fibrosis, which does not lead to detectable LGE for two reasons. First, the new optimized segmented inversion recovery sequence ...
Nandrolone and resistance training induce heart remodeling: Role
... increased in response to high-intensity physical training in rats treated with vehicle or nandrolone, when compared with the respective non-trained groups (Table 1; p b 0.05). Moreover, the NTN group also presented higher RWT in comparison with the NTV group (Table 1; p b 0.05). The interventricular ...
... increased in response to high-intensity physical training in rats treated with vehicle or nandrolone, when compared with the respective non-trained groups (Table 1; p b 0.05). Moreover, the NTN group also presented higher RWT in comparison with the NTV group (Table 1; p b 0.05). The interventricular ...
A clinical approach to the assessment of left ventricular diastolic
... inflow. Pulmonary venous flow pattern has also been well characterised and provides additive insight to diastolic filling of the left ventricle.18–24 The pattern of flow (systolic versus diastolic predominance) has been proposed as a predictor of left atrial pressure but is not applicable in unselec ...
... inflow. Pulmonary venous flow pattern has also been well characterised and provides additive insight to diastolic filling of the left ventricle.18–24 The pattern of flow (systolic versus diastolic predominance) has been proposed as a predictor of left atrial pressure but is not applicable in unselec ...
Lucía Romero, Esther Pueyo, Martin Fink and Blanca Rodríguez
... particularly important during the drug development process, as certain drugs can exhibit cardiotoxicity (i.e., unwanted side effects such as drug-induced alterations in cardiac ionic currents), which can put patients at risk of developing cardiac arrhythmias such as Torsades de Pointes (TdP). An opt ...
... particularly important during the drug development process, as certain drugs can exhibit cardiotoxicity (i.e., unwanted side effects such as drug-induced alterations in cardiac ionic currents), which can put patients at risk of developing cardiac arrhythmias such as Torsades de Pointes (TdP). An opt ...
An Intelligent System for Pacemaker Reprogramming
... beat is under control of the sinoatrial node, or sinus node, a small strip of specialised selfexcitatory tissue, located in the wall of the right atrium. The sinoatrial node fires rhythmically at a rate of approximately 75 beats per minute. It generates an electrical impulse, called an action potent ...
... beat is under control of the sinoatrial node, or sinus node, a small strip of specialised selfexcitatory tissue, located in the wall of the right atrium. The sinoatrial node fires rhythmically at a rate of approximately 75 beats per minute. It generates an electrical impulse, called an action potent ...
Changes in Pulmonary Venous Return during
... table with foot support; heart rate was monitored continuously and electrocardiographic recordings were obtained at 1 min intervals throughout the study; heart rate and blood pressure were determined at 1min intervals with the Dinamap system (Critikon, Tampa, FL, U.S.A.) which computes blood pressur ...
... table with foot support; heart rate was monitored continuously and electrocardiographic recordings were obtained at 1 min intervals throughout the study; heart rate and blood pressure were determined at 1min intervals with the Dinamap system (Critikon, Tampa, FL, U.S.A.) which computes blood pressur ...
Publication - American Heart Association
... Phosphenes are phenomena described as a transiently enhanced brightness in a limited area of the visual field, halos, image decomposition (stroboscopic or kaleidoscopic effects), colored bright lights, or multiple images (retinal persistency). Phosphenes are usually triggered by sudden variations in ...
... Phosphenes are phenomena described as a transiently enhanced brightness in a limited area of the visual field, halos, image decomposition (stroboscopic or kaleidoscopic effects), colored bright lights, or multiple images (retinal persistency). Phosphenes are usually triggered by sudden variations in ...
Cardiorespiratory response to aerobic exercise programs with
... with lower intensity. Now we will discuss these finding under two separate heading, that is, cardiac changes and respiratory changes. Cardiac changes In this study, volunteers were involved in 20-week endurance exercise programs with different intensity. Endurance training is associated with an incr ...
... with lower intensity. Now we will discuss these finding under two separate heading, that is, cardiac changes and respiratory changes. Cardiac changes In this study, volunteers were involved in 20-week endurance exercise programs with different intensity. Endurance training is associated with an incr ...
Alternate Model for CR Programming
... programs, that survivors of myocardial infarctions are older and sicker and that poor compliance is often secondary to related medical problems and lack of motivation to exercise. However, participation for such patients may be even more important because they are less physically capable, more depen ...
... programs, that survivors of myocardial infarctions are older and sicker and that poor compliance is often secondary to related medical problems and lack of motivation to exercise. However, participation for such patients may be even more important because they are less physically capable, more depen ...
The contribution of mitral annular excursion and shape - AJP
... the segments´ area and their incremental excursion. The 3D LV volumes were calculated by tracing the endocardial border in 6 coaxial planes. The AEV (10±2 ml) represented 19±3% of the total LV stroke volume (52±12 ml). The AEV correlated strongly with LV stroke volume (r = 0.73, p<0.05). Peak MA are ...
... the segments´ area and their incremental excursion. The 3D LV volumes were calculated by tracing the endocardial border in 6 coaxial planes. The AEV (10±2 ml) represented 19±3% of the total LV stroke volume (52±12 ml). The AEV correlated strongly with LV stroke volume (r = 0.73, p<0.05). Peak MA are ...
Role of percutaneous left ventricular assist devices in preventing
... of complications has been found to be low [67] . In the presence of femoral or iliac artery disease, access may be obtained with stenting of stenotic vessels prior to implantation of the PVAD. In uncomplicated cases, the Impella LP 2.5 may be deployed within a few minutes, which may be of clinical i ...
... of complications has been found to be low [67] . In the presence of femoral or iliac artery disease, access may be obtained with stenting of stenotic vessels prior to implantation of the PVAD. In uncomplicated cases, the Impella LP 2.5 may be deployed within a few minutes, which may be of clinical i ...
PDF - Circulation
... Materials and Methods The clinical records, including ECGs, coronary arteriograms, left ventricular cineangiograms and myocardial perfusion scintigrams of 197 patients studied at Loma Linda University Medical Center during a 4-year interval, were analyzed. The patients were referred for diagnostic w ...
... Materials and Methods The clinical records, including ECGs, coronary arteriograms, left ventricular cineangiograms and myocardial perfusion scintigrams of 197 patients studied at Loma Linda University Medical Center during a 4-year interval, were analyzed. The patients were referred for diagnostic w ...
Multi-contrast late enhancement CMR determined gray zone and
... the ICD clinic. Twelve patients had at least one appropriate ICD therapy for ventricular arrhythmias at follow-up. Only the proportion of gray zone measured with MCLE and papillary muscle infarct scores demonstrated a statistically significant difference (P < 0.05) between patients with and without ...
... the ICD clinic. Twelve patients had at least one appropriate ICD therapy for ventricular arrhythmias at follow-up. Only the proportion of gray zone measured with MCLE and papillary muscle infarct scores demonstrated a statistically significant difference (P < 0.05) between patients with and without ...
Calibrated integrated backscatter and
... interpreted the association of cIB with left ventricular functional abnormalities as evidence for the contribution of myocardial fibrosis to these abnormalities.6 7 There is, however, uncertainty about the relationship between cIB and fibrosis in patients with less extensive fibrosis. We have shown tha ...
... interpreted the association of cIB with left ventricular functional abnormalities as evidence for the contribution of myocardial fibrosis to these abnormalities.6 7 There is, however, uncertainty about the relationship between cIB and fibrosis in patients with less extensive fibrosis. We have shown tha ...
Cardiovascular response to physical exercise in adult
... Objective: To assess with magnetic resonance imaging (MRI) cardiovascular function in response to exercise in patients after atrial correction of transposition of the great arteries (TGA). Methods: Cardiac function at rest and during submaximal exercise was assessed with MRI in 27 patients with TGA ...
... Objective: To assess with magnetic resonance imaging (MRI) cardiovascular function in response to exercise in patients after atrial correction of transposition of the great arteries (TGA). Methods: Cardiac function at rest and during submaximal exercise was assessed with MRI in 27 patients with TGA ...
New Diagnostic and Therapeutic Possibilities For Diastolic Heart
... failure with a normal left ventricular ejection fraction (i.e. >50%). Suggestive of the diagnosis is the presence of left ventricular diastolic dysfunction. While the gold standard for diastolic dysfunction is thought to be derived from ventricular pressure volume loops, this is generally an impract ...
... failure with a normal left ventricular ejection fraction (i.e. >50%). Suggestive of the diagnosis is the presence of left ventricular diastolic dysfunction. While the gold standard for diastolic dysfunction is thought to be derived from ventricular pressure volume loops, this is generally an impract ...
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.