See the ECG Tutorial section on QT interval to learn how this is measured. Multiple medications ... QT interval. Prolonged QT genetic syndromes exist and include Romano-Ward syndrome, Jervell ...

Prolonged QT syndrome ... Long QT 1: The ECG shows broad based T waves. A majority of arrhythmias in this group occur during exercise. Beta-blockers are effective treatment and an ICD is not ...

The electrocardiogram (ECG) characteristics of this patient indicated the likelihood of LQTS1. Polymorphic ventricular extrasystolies and episodes of polymorphic non-sustained ventricular ...