Radiofrequency Catheter Ablation of Right Ventricular Outflow Tract Tachycardia Late After Complete Repair of Tetralogy of Fallot Using the Pace Mapping Technique

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Abstract
While surgical repair of tetralogy of Fallot has improved the long-term outlook for this patient population, sudden death late after repair remains a problem. Ventricular tachycardia (VT) originating in the right ventricular outflow tract (RVOT) is a well described, clinically important finding following surgical repair of tetralogy and a number of investigators suggest that this VT plays a critical role in the etiology of sudden death. We report two patients with RVOT VT late after repair of tetralogy who underwent successful radiofrequency ablation of their tachycardia.