Acquired long QT syndrome: long-term electrocardiographic (Holter) recording of torsades de pointes ending in asystole: II.

The Holter recording in an elderly female patient on Risperidone treatment who developed a longer than expected prolonged QT interval and associated torsades de pointes (TdP) at the onset of complete AV block is presented. The electrocardiographic manifestation of (likely) phase 2 early afterdepolarizations (EAD) as a trigger of TdP episodes; the TdP undulating or monomorphic morphologies as a counterpart of drifting or stationery scrolls, respectively, and the TdP final extinction leading to asystole and death are shown.