The rhythm is regular at a rate of 66 beats/min. A P wave occurs before each QRS complex (+) with a stable PR interval (0.16 sec). The P wave is positive in leads I, II, aVF, and V4-V6. Hence, this is ...

Oakland, CA - Chronic ST elevation caused by early repolarization is especially prevalent in young black men engaging in vigorous exercise but has an essentially benign prognosis, according to a study ...

SAN FRANCISCO -- Cardiac repolarization dynamics seemed to cycle in sync with the menstrual cycle of some people with congenital and drug-induced long QT syndrome (LQTS), a small prospective study ...

Implantable defibrillators can save lives, but also harbor risks. A major study has found that a special ECG method can help to identify the patients most likely to benefit from these devices.