BUNDLE-BRANCH REENTRY TACHYCARDIA

A 21-year-old man with aborted sudden death developed bundle-branch re entry tachycardia at electrophysiologic study. Ablation of the right b undle branch was performed in an attempt to eliminate the recurrence o f ventricular arrhythmia The clinical arrhythmia was no longer inducib le; however, a second type of ventricular tachycardia of a different m echanism and origin was induced. Following a new clinical episode of v entricular tachycardia with hemodynamic deterioration, an automatic im plantable cardioverter and defibrillator was implanted.