Electrocardiographic predictors of bradycardia-induced torsades de pointes in patients with acquired atrioventricular block.

Background: Predictors of torsades de pointes (TdP) in bradyarrhythmia-induced acquired long QT syndrome are not well defined.

Objective: The purpose of this study was to search for electrocardiographic (ECG) TdP predictors in patients with acquired atrioventricular block (AVB) and QT prolongation.

Methods: We analyzed 12-lead ECGs from 20 patients (15 females, age 65.