(Circulation. 1996;94:1902-1908.)
© 1996 American Heart Association, Inc.
Articles |
Radiofrequency Catheter Ablation of Right Ventricular Tachycardia Late After Repair of Congenital Heart Defects
the Departments of Cardiology and Pediatric Cardiology (G.E.), University Hospital Gottingen, Germany.
Correspondence to Bernd-Dieter Gonska, MD, Department of Cardiology, St Vincentius Hospital, Edgar-von-Gierke Str 2, 76135 Karlsruhe, Germany.
Background Ventricular arrhythmias after repair of congenital heart defects are a common finding and possibly contribute to sudden death in these patients. Optimal antiarrhythmic management has not yet been defined.
Methods and Results The study population consisted of 16 patients in whom ventricular arrhythmias occurred 11 to 42 years after complete surgical repair of congenital heart defects. Fifteen patients had a history of symptomatic sustained or nonsustained ventricular tachycardia, and 1 had frequent nonsustained ventricular tachycardia. The diagnostic mapping procedure to identify the origin of the arrhythmia included pace mapping during sinus rhythm, activation mapping, and pacing interventions during ventricular tachycardia. Catheter ablation was carried out by means of radiofrequency energy in the temperature-controlled mode. The follow-up period was 6 to 33 months (mean, 16 months). A right ventricular origin of the tachycardia in the surgically corrected area could be determined in all patients. Catheter ablation was carried out without complications. Immediate noninducibility was achieved in 15 of the 16 patients. One patient in whom the tachycardia was again inducible at repeat stimulation 1 week later was successfully treated with amiodarone. Eleven patients were taken off antiarrhythmic drugs. During follow-up, none of them had a recurrence of the tachycardia that had been ablated.
Conclusions In patients with symptomatic or frequent ventricular tachycardia late after complete surgical repair of congenital heart defects, catheter ablation by means of radiofrequency energy is feasible and safe and thus might be taken into consideration for these patients. Short-term follow-up results are promising.
Key Words: arrhythmia • heart defects, congenital • tachycardia • catheter ablation
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