Fehmi Keçe

Chapter 8 172 pacemaker insertion. In the remaining 13, re-PV isolation (n=9), re-isolation of box lesion (n=9), superior vena cava isolation (n=1), mitral isthmus ablation (n=4), anterior box lesion isolation (n=1), and other LA atrial tachycardia ablation (n=4) was performed. Out of 13 patients, follow-up data was available in 10 (2 patients lost to follow-up). In 1 patient, the procedure was aborted because of a cardiac tamponade and AF was accepted. During a median follow up of 9 (IQR 5-18) months after the repeat procedure, 4 (40%) patients maintained sinus rhythm without AAD’s and 6 (60%) patients had recurrent AF after a period of 5 (IQR 4-8) months. In summary AF-free survival after the index procedure was 40% and after the repeated procedures 51% off AADs. AF-free survival on/off AAD in the entire group after repeated procedures was 64%. Figure 2. Atrial fibrillation-free survival off AAD according to box surface ratio (Box SR).