Catheter technique for electrical ablation of the atrioventricular conduction system.

Seven patients with recurrent supraventricular arrhythmias, resistant to conventional drug therapy, were treated with electrical ablation of the atrioventricular (AV) conduction system. Permanent AV block was produced in five patients. Restoration of AV conduction occurred in two patients. The procedure of electrical ablation was well tolerated, without complications.