Study population
Thirty patients were excluded because of a previous heart surgery (9 patients), LA roof-line ablation performed with an RF catheter (2 patients), and insufficient clinical follow-up after catheter ablation (19 patients). Of the remaining 340 patients, 131 underwent MI ablation and 18 underwent LAPW ablation without LAPW bottom line ablation. Finally, 191 patients with non-paroxysmal AF were analyzed. The baseline patient characteristics are shown in Table 1 and compared between patients who underwent cryoballoon ablation of the LA roof and those who did not (Table 2). Three patients had right middle PVs, and 15 patients had left common PVs.