[Transvenous high frequency current ablation of atrioventricular conduction in therapy refractory tachycardic atrial fibrillation].

We present a case of radiofrequency ablation of the atrioventricular conduction system by means of intravenous catheter technique in a patient with drug-refractory paroxysmal atrial fibrillation. Total AV block was produced. Since the ablation and implantation of a pacemaker this female has had no recurrences. The advantages of this method compared with electrical fulguration are better control of delivered energy and reduction of complications (catheter perforation, thromboembolism). The disadvantage of radiofrequency ablation is the difficulty in positioning the catheter so as to give the most precise contact with the tissue, which is a very time-consuming procedure.