Study limitations
First, this was a single-center, non-randomized study with a small population. We were unable to compare patients who underwent CBA for PVI and LA roof ablation with patients who underwent CBA for PVI alone; therefore, a larger, randomized multicenter study is required. Second, although we performed CBA under LET monitoring, data regarding the nadir LET during CBA >18°C are missing; thus, we could not sufficiently argue for the association between nadir LET and GH or the cutoff value of LET during CBA. Finally, as patients were scheduled for discharge 2 days after ablation, we could not sufficiently assess their symptoms 1 week after ablation.