On the basis of these assumptions, we obtained 83% of final success in 12 cases of AFl treated by radiofrequency. Some working groups performed the procedure as the basis of electrophysiological findings, while others preferred an anatomical approach applying radiofrequency energy at the isthmus lying between the coronary sinus ostium and the tricuspid ring, near the vena cava orifice. The majority of them (> 80%) were successfully treated with radiofrequency. Two hundred and one cases of AFl tested by catheter ablation were previously reported. On the basis of our personal experience regarding 11 cases (4 of right atrium EAT and 7 of left) we discuss here the essential role of unipolar leads derived from the mapping catheter to select the target for radiofrequency applications. To our knowledge 108 cases of EAT treated by catheter ablation of the ectopic focus are reported in the literature with a success rate superior to 90%.

Many studies reported a very high success rate on the use of catheter ablation with radiofrequency current for the treatment of supraventricular arrhythmias and recently, various preliminary reports are dedicated to the treatment of EAT, AFl, and AF with that source of energy. The first experiences of nonpharmacological treatment of ectopic atrial tachycardia (EAT), common atrial flutter (AFl), and atrial fibrillation (AF) were performed by surgical techniques.

Atrial flutter ablation success rate