Can Intense Endurance Exercise Cause Myocardial Damage and
... There is now reasonably compelling evidence that some cardiac arrhythmias are associated with long-standing endurance training. In the general population, AF is the most common sustained arrhythmia, with a prevalence of approximately 0.5% in middle-aged subjects increasing to 10% in those in their 8 ...
... There is now reasonably compelling evidence that some cardiac arrhythmias are associated with long-standing endurance training. In the general population, AF is the most common sustained arrhythmia, with a prevalence of approximately 0.5% in middle-aged subjects increasing to 10% in those in their 8 ...
Cardiovascular Imaging for Nuclear Cardiologists: First Step of
... substantial mortality and morbidity from this disease. CS may ...
... substantial mortality and morbidity from this disease. CS may ...
Simplified 2D Bidomain Model of Whole Heart Electrical Activity and
... two-dimensional (2D) model of cardiac electrical activity that can generate spontaneous periodic activation within the sinoatrial node (SAN) and can reproduce a realistic surface electrocardiogram (ECG) on the torso. The model can be used as a basis for quick and reliable a priori formulation, testi ...
... two-dimensional (2D) model of cardiac electrical activity that can generate spontaneous periodic activation within the sinoatrial node (SAN) and can reproduce a realistic surface electrocardiogram (ECG) on the torso. The model can be used as a basis for quick and reliable a priori formulation, testi ...
The Effect Vagus Nerve Stimulation Vulnerability
... via the right external jugular vein and positioned at the apex of the right ventricle under fluoroscopic control.The pacing stimulus was 5 ma in intensity. The pacing interval was 240 to 333 msec, corresponding to a ventricular rate of 180-250 beats per minute. These high pacing frequencies were req ...
... via the right external jugular vein and positioned at the apex of the right ventricle under fluoroscopic control.The pacing stimulus was 5 ma in intensity. The pacing interval was 240 to 333 msec, corresponding to a ventricular rate of 180-250 beats per minute. These high pacing frequencies were req ...
Analysis of Left Ventricular Wall Motion by Reflected
... movement of the left ventricle as a whole, first anteriorly toward the ultrasound transducer during late systole then posteriorly away from it at the beginning of left ventricular relaxation. These movements added to the amplitude of posterior wall motion but subtracted from the motion of the septum ...
... movement of the left ventricle as a whole, first anteriorly toward the ultrasound transducer during late systole then posteriorly away from it at the beginning of left ventricular relaxation. These movements added to the amplitude of posterior wall motion but subtracted from the motion of the septum ...
Cardiac Rhythm Analysis: Learning package
... relaxation of the myocardial cells. These electrical impulses are generated by a flow of positively charged ions back and forth across the cardiac cell membrane, creating an electrical current which results in depolarization (electrical activation), contraction, and repolarization (recovery) of the ...
... relaxation of the myocardial cells. These electrical impulses are generated by a flow of positively charged ions back and forth across the cardiac cell membrane, creating an electrical current which results in depolarization (electrical activation), contraction, and repolarization (recovery) of the ...
Ventricular Assist Devices
... circulatory support in patients with end-stage heart failure (HF) who are not candidates for transplantation. Ventricular assist devices (VADs) are used to assist the left ventricle (LVADs), the right ventricle (RVADs), or both, and removal of the native heart is not necessary; VADs do not replace t ...
... circulatory support in patients with end-stage heart failure (HF) who are not candidates for transplantation. Ventricular assist devices (VADs) are used to assist the left ventricle (LVADs), the right ventricle (RVADs), or both, and removal of the native heart is not necessary; VADs do not replace t ...
Electrocardiographic Evidence for Left Ventricular Hypertrophy
... segments and negative T waves in leads I, aVL, V4-V6. The importance of having more than one criterion for LVH on the electrocardiogram is illustrated by this electrocardiogram. It was done on a 41-year-old woman with uncontrolled hypertension despite three drugs (catapres, capotin and tenormin)o Th ...
... segments and negative T waves in leads I, aVL, V4-V6. The importance of having more than one criterion for LVH on the electrocardiogram is illustrated by this electrocardiogram. It was done on a 41-year-old woman with uncontrolled hypertension despite three drugs (catapres, capotin and tenormin)o Th ...
Comparison of Uhl`s anomaly, right ventricular outflow tract
... parchment heart1. Fontaine et al2 described an entity, called arrhythmogenic right ventricular dysplasia, which was characterized, by localized deficiency ...
... parchment heart1. Fontaine et al2 described an entity, called arrhythmogenic right ventricular dysplasia, which was characterized, by localized deficiency ...
Inherited Cardiac Arrhythmias
... Background: The incidence of sudden cardiac death in persons under age 40 is roughly 3 per 100 000 persons per year in Germany and North America. Many of these deaths are found to be due to hereditary heart diseases, often a primary structural heart disease associated with arrhythmia or else a prima ...
... Background: The incidence of sudden cardiac death in persons under age 40 is roughly 3 per 100 000 persons per year in Germany and North America. Many of these deaths are found to be due to hereditary heart diseases, often a primary structural heart disease associated with arrhythmia or else a prima ...
HRO_Europace_revisionV4 - Spiral
... Introduction Cardiac resynchronisation therapy (CRT) is an established treatment for patients with heart failure and left bundle branch block (LBBB) or complete heart block. However, despite treatment, morbidity and mortality remain high1. The current assumption is that the predominant mechanism of ...
... Introduction Cardiac resynchronisation therapy (CRT) is an established treatment for patients with heart failure and left bundle branch block (LBBB) or complete heart block. However, despite treatment, morbidity and mortality remain high1. The current assumption is that the predominant mechanism of ...
ACUTE CORONARY SYNDROMES: Acute MI
... dysrhythmias are dependent on ventricular function – Normal hearts have a loss of 10-20% of left ventricular output when atrial kick is eliminated – Reduced left ventricular compliance can result in 35% reduction in stroke volume when the atrial systole is eliminated ...
... dysrhythmias are dependent on ventricular function – Normal hearts have a loss of 10-20% of left ventricular output when atrial kick is eliminated – Reduced left ventricular compliance can result in 35% reduction in stroke volume when the atrial systole is eliminated ...
PDF - Circulation: Arrhythmia and Electrophysiology
... mapping and ablation of a range of ventricular and atrial arrhythmias.1–3 The seminal description of this technique by Sosa described the use of the left anterior oblique fluoroscopic projection.4 After performing trials, we now prefer the left lateral fluoroscopic projection because it more clearly ...
... mapping and ablation of a range of ventricular and atrial arrhythmias.1–3 The seminal description of this technique by Sosa described the use of the left anterior oblique fluoroscopic projection.4 After performing trials, we now prefer the left lateral fluoroscopic projection because it more clearly ...
Arrhythmogenic effect of flecainide toxicity
... depresses the rate of depolarization of cardiac action potentials producing a membrane stabilizing action. It is a very effective anti-arrhythmic agent against supraventricular arrhythmias, nevertheless flecainide is contraindicated in patients with structural heart disease because it increased mort ...
... depresses the rate of depolarization of cardiac action potentials producing a membrane stabilizing action. It is a very effective anti-arrhythmic agent against supraventricular arrhythmias, nevertheless flecainide is contraindicated in patients with structural heart disease because it increased mort ...
An Automated External Defibrillator (AED) is a
... medical emergency. Lifebeats First Aid not only trains individuals on how to use an AED, but we also have chosen to promote and sell a specific brand called Physio Control Lifepak CR Plus. ...
... medical emergency. Lifebeats First Aid not only trains individuals on how to use an AED, but we also have chosen to promote and sell a specific brand called Physio Control Lifepak CR Plus. ...
Arrhythmogenic right ventricular cardiomyopathy/dysplasia
... clinically characterized by life-threatening ventricular arrhythmias. Its prevalence has been estimated to vary from 1:2,500 to 1:5,000. ARVC/D is a major cause of sudden death in the young and athletes. The pathology consists of a genetically determined dystrophy of the right ventricular myocardium ...
... clinically characterized by life-threatening ventricular arrhythmias. Its prevalence has been estimated to vary from 1:2,500 to 1:5,000. ARVC/D is a major cause of sudden death in the young and athletes. The pathology consists of a genetically determined dystrophy of the right ventricular myocardium ...
Prevalence and clinical characteristics of left ventricular dysfunction
... medical history, that independently predicted left ventricular dysfunction. The strongest predictors were history of myocardial infarction (odds ratio 3.8; positive likelihood ratio 4.3) and angina (2.6; 3.3). The most specific physical sign was a raised jugular venous pressure > 5 cm (specificity 9 ...
... medical history, that independently predicted left ventricular dysfunction. The strongest predictors were history of myocardial infarction (odds ratio 3.8; positive likelihood ratio 4.3) and angina (2.6; 3.3). The most specific physical sign was a raised jugular venous pressure > 5 cm (specificity 9 ...
Advances in Arrhythmia and Electrophysiology
... to the persistent T-wave changes on the ECG after a period of wide QRS rhythms that become evident once normal ventricular activation pattern is restored. It is related to the term ventricular electric remodeling sometimes used in basic science literature. Although CM itself is considered as an adap ...
... to the persistent T-wave changes on the ECG after a period of wide QRS rhythms that become evident once normal ventricular activation pattern is restored. It is related to the term ventricular electric remodeling sometimes used in basic science literature. Although CM itself is considered as an adap ...
S2405500X16304042_mmc1 - JACC: Clinical Electrophysiology
... wedge model is the only model capable of recapitulating all features of the BrS (e.g., response to pharmacologic agents, response to ablation, response to changes in heart rate, electrographic and arrhythmic manifestations). This model permitted us and other groups the ability to elucidate the cell ...
... wedge model is the only model capable of recapitulating all features of the BrS (e.g., response to pharmacologic agents, response to ablation, response to changes in heart rate, electrographic and arrhythmic manifestations). This model permitted us and other groups the ability to elucidate the cell ...
Cardiac Memory and Review
... within 2 hours.7 Although this tends to increase with increases in pacing rate7 or duration of pacing, its accumulation is masked by the concomitant occurrence of atrial arrhythmias whose P wave is similar to that of the sinus P wave and that compete with both the sinus and paced rhythms.8 The net r ...
... within 2 hours.7 Although this tends to increase with increases in pacing rate7 or duration of pacing, its accumulation is masked by the concomitant occurrence of atrial arrhythmias whose P wave is similar to that of the sinus P wave and that compete with both the sinus and paced rhythms.8 The net r ...
Dispersion of QT interval in patients with and without
... current methods of measuring recovery time dispersion (i.e., epicardial or endocardial monophasic action potentials) and body surface mapping are not very practical for routine clinical use. Recently, measurement of the variability in QT interval duration among the different leads of the standard 12 ...
... current methods of measuring recovery time dispersion (i.e., epicardial or endocardial monophasic action potentials) and body surface mapping are not very practical for routine clinical use. Recently, measurement of the variability in QT interval duration among the different leads of the standard 12 ...
Systemic vascular resistance: an unreliable index of left
... for zero position and overall gain. In five of the six animals, no differences were noted. In the remaining dog, a 2 mm Hg shift in the zero position without a change in overall gain was present. Statistical analysis. Each dog served as his own control. The paired t test was used to assess the hemod ...
... for zero position and overall gain. In five of the six animals, no differences were noted. In the remaining dog, a 2 mm Hg shift in the zero position without a change in overall gain was present. Statistical analysis. Each dog served as his own control. The paired t test was used to assess the hemod ...
How to differentiate athlete`s heart from pathological
... aortic regurgitation), or myocardial disease (e.g. hypertrophic cardiomyopathy). Distinction between physiological and pathological hypertrophy might have major implications, since undiagnosed hypertrophic cardiomyopathy is one of the most common causes of sudden cardiac death in athletes, whereas i ...
... aortic regurgitation), or myocardial disease (e.g. hypertrophic cardiomyopathy). Distinction between physiological and pathological hypertrophy might have major implications, since undiagnosed hypertrophic cardiomyopathy is one of the most common causes of sudden cardiac death in athletes, whereas i ...
Contemporary Management of Sudden Cardiac Death
... to recommend CRT + ICD, when there is an overlapping indication (advanced HF, EF < 35%, QRS duration > 120 msec).25 ...
... to recommend CRT + ICD, when there is an overlapping indication (advanced HF, EF < 35%, QRS duration > 120 msec).25 ...
Figure 5 - ECG/VCG correlation in the Horizontal Plane
... In endocardial cushion defects the compact AV node is inferoposteriorly displaced outside Koch’s triangle adjacent to where posterior rims of atrial and ventricular septae unite (3). The His bundle extends along the lower rim of the ventricular septum. This inferior course and relative hypoplasic an ...
... In endocardial cushion defects the compact AV node is inferoposteriorly displaced outside Koch’s triangle adjacent to where posterior rims of atrial and ventricular septae unite (3). The His bundle extends along the lower rim of the ventricular septum. This inferior course and relative hypoplasic an ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.