 Following completion of the procedure, patients will have anti vitamin K drug therapy for 3 months and antiarrhythmic drug for 1 month in case of early atrial arrhythmia recurrence. Two-dimensional echocardiogram will be performed systematically prior to discharge. All 3 months, long-term follow-up consisted from the date of the ablation procedure with consultation, stress test, holter-ECG 24 h and echocardiography. At 3 months a repeat EP procedure will be performed in patients with AF recurrence to assess whether or not lines are still blocked. If not, RF will be delivered to block them again and cure AF. 