Radiofrequency Catheter Ablation of Ventricular Tachycardia after Repair of Tetralogy of Fallot

Abstract

Sustained monomorphic ventricular tachycardia (SMVT) is a late complication of corrective surgery for tetralogy of Fallot. The success rate of conventional radiofrequency ablation is <50% due to patients’ characteristics. Three-dimensional electroanatomic mapping system is associated with favorable outcomes.

We describe the case of a 53 year-old male patient with a history of previous corrective surgery for tetralogy of Fallot and an implantable cardioverter defibrillator due to syncope secondary to SMTV. Despite being treated with amiodarone, radiofrequency catheter ablation was indicated due to recurrences. In addition, we describe three-dimensional electroanatomic mapping system as a complement to conventional electrophysiology for an adequate characterization of the arrhythmogenic circuits undergoing radiofrequency catheter ablation.

To our understanding, this is the first case published in Argentina of radiofrequency catheter ablation of a SMVT in patients with corrective surgery for tetralogy of Fallot.