2.5 Follow-up
Antiarrhythmic drugs were resumed after ablation at the discretion of the attending physician. Twelve-lead electrocardiography was performed for all patients at 1, 3, and 6 months, and 24-hour electrocardiographic monitoring was performed every 3 to 6 months. AF occurring 3 months or more after the ablation procedure and lasting at least 30 seconds was diagnosed as AF recurrence.