THE electrocardiographic picture of prolonged QRS-complex duration with short PR interval was the subject of isolated reports 1,2 until Wolff, Parkinson and White 3 described the clinical syndrome of ...

The correct diagnosis is sinus rhythm, nonconducted premature atrial complexes (PACs), and junctional escape complex (Figure 2). The rhythm is irregular, but the long intervals are all the same (↔) ...

The diagnosis is normal sinus rhythm, first-degree AV block (prolonged AV conduction), premature ventricular complexes, escape junctional complex, left ventricular hypertrophy with associated ST-T ...

Among patients hospitalized with heart failure, having a longer than normal QRS duration appears to predict a high risk of death or rehospitalization within a few months after discharge, according to ...

The PR interval is the time from the beginning of the P wave (atrial depolarization) to the beginning of the QRS complex (ventricular depolarization). The normal PR interval measures 0.12-0.20 seconds ...

Prolongation of the QT c interval can result from lengthening of ventricular activation and/or repolarization due to ischemia. Although we have previously reported exercise induced ischemic-like ST ...

Current guidelines from the American College of Cardiology and the American Heart Association recommend cardiac resynchronization therapy (CRT) for patients with NYHA class III or IV heart failure ...

To test the hypothesis that fetuses exposed to maternal preeclampsia or chronic hypertension have deranged development of cardiac time intervals. Pregnancies were divided into three groups: ...

QRS interval widening appears to be highly specific for the diagnosis of hyperkalemia in patients with end-stage kidney disease. ECG changes, in general, have poor sensitivities for hyperkalemia in ...