Prevention and epidemiology Excessive heart rate increase during mild mental stress in preparation for exercise predicts sudden death in the general populationJouvenX.SchwartzP.J.EscolanoS.StraczekC.TaffletM.EUROPEAN HEART JOURNAL
Changes in heart rate during exercise and recovery from exercise are mediated by the balance between sympathetic and vagal activity. Since alterations in the neural control of cardiac function contribute to the risk of sudden death, we tested the hypothesis that among apparently healthy persons, sudde...
Sudden infant death syndrome (SIDS) has been mainly described from a risk perspective, with a focus on endogenous, exogenous, and temporal risk factors that can interact to facilitate lethal outcomes. Here we discuss the limitations that this risk-based paradigm may have, using two of the major...
oratrium, of the heart. This electrical spark is carried through pathways in the heart so that all the muscle cells contract at once and produce a heartbeat. This pumps blood through the heart valves and into all the organs of the body so that they can do ...
In animal models, a single blow directly over the precordium 10 to 30 ms before the T-wave peak on the electrocardiogram has been demonstrated to induce VF. A rapid increase in LV pressure follows, which appears to activate ion channels via mechanoelectric coupling, resulting in the generation...
28 Notably, in the last decade, drug-induced TdP was the single most common cause of the withdrawal or restriction of the use of drugs that have already been marketed.12 The ACCF/AHA scientific statement recognized a QTc interval of >500 ms, or an increase after drug administration of QTc...
This finding suggests that misclassified occult overdose deaths may partially explain the previously reported increase in SCD risk with some QTPMs.19,24 Occult overdoses misclassified as SCDs may also account for the previously reported association between psychiatric and neurological QTPMs, including ...
increase of myocardial interstitial fibrosis, resulting in decreased left ventricular (LV) luminal volume and increased LV wall thickness and mass that contributes to impaired diastolic filling (diastolic dysfunction), increased systolic function, and, in some cases, left ventricular outflow tract ...
Which of the following can result in amenorrhea? a. Damage to bones b. Lowering of heart rate c. Excessive exercise and starvation d. An increase in muscle mass P.J. has noticed that his chest pain is occurring with increasing frequency, and less activ...
When a heart attack occurs in the left ventricle (left lower pumping chamber of the heart), a scar forms. The scarred tissue may increase the risk of ventricular tachycardia. The electrophysiologist (doctor specializing in electrical disorders of the heart) can determine the exact area causing th...