engleski

Radiofrequency catheter ablation of the bundle branch reentrant ventricular tachycardia

Bundle branch reentrant ventricular tachycardia (BBRVT) has a suitable anatomic substrate for radiofrequency catheter ablation. However, the experience with this treatment is still small. In the current study, we examined the safety and the long-term efficacy of radiofrequency ablation in the cure of patients with BBRVT. Four patients with BBRVT, identified during electrophysiological study, underwent temperature-controlled radiofrequeny ablation of the right bundle branch (RBB). All of them had syncope and structural heart disease with reduced left ventricular ejection fraction. The baseline examination revealed an intraventricular block, prolonged HV interval and inducible sustained VT because of bundle branch reentry. RRB was successfully ablated in all patients after delivery of 3+-1 radiofrequency pulses. After ablation, a permanent pacemaker was implanted in one patient with significantly prolonged HV interval. All patients were free of BBRVT during a mean follow-up of 20 months. One patient received implantable cardioverter defibrillator for myocardial VT five months after ablation. Two patients developed congestive heart failure. Radiofrequeny catheter ablation of the RBB is a safe and highly effective therapeutic procedure for definitve cure of BBRVT. Long-term prognosis of these patients depends mainly on the underlying heart disease and the treatment of other VT.

radiofrequency ablation; bundle branch reentrant tachycardia

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