[Transcatheter radiofrequency modulation and ablation of the atrioventricular junction in supraventricular arrhythmias refractory to medical therapy].

In patients with supraventricular tachyarrhythmias refractory to medical therapy, transcatheter ablation (TA) is necessary. From January 1990, in 27 patients with nodal tachycardia and 6 with atrial fibrillation or flutter, referred to our institution for electrophysiologic evaluation, TA by radiofrequency (RF) was performed, respectively for atrioventricular (AV) junction modulation and total AV junction ablation. In all these cases, a total refractoriness to several antiarrhythmic drugs alone or in combination had been observed.