Prolongation and shortening of the QT interval on the electrocardiogram (ECG) are non-invasive markers of delayed and accelerated myocardial repolarization, respectively, and of increased risk of SCD ...

The mechanism of 2:1 atrioventricular block in infants with the congenital long QT syndrome has been postulated to result from a long ventricular effective refractory period interrupting conduction of ...

Boston, MA - Patients who receive high doses of the antidepressants citalopram or escitalopram could potentially develop QT-interval prolongation, a marker of a slight increased risk for ventricular ...

Patients who receive high doses of some, but not all, antidepressants may be at risk of developing prolongation of the QT interval, a marker for possible ventricular arrhythmia, new research suggests.