Control of Refractory Supraventricular Arrhythmias After Unsuccessful Closed‐Chest His Bundle Ablation

Six palients underwent attempted catheter ablation of the His bundle for control of refractory supraventricular tachyarrhythmias. Permanent complete heart block was achieved in only three patients. All six patients have remained asymptomatic withoul anfiarrhythmic medicolions over a follow-up period of six to 17 months (mean 10 months). There were no complicalions of the procedure apart from mild elevation of creatine kinase levels in three patients. In this series, resumption of atrioventrcular (AV) conduction following attempted His bundle ablation was not associated with recurrence of symptomatic arrhythmias. Preservation of AV conduction may also obviate the need for permanent ventricular pacing.