DISCUSSION
GH appeared in 18.8% of patients after CBA of the LA roof with PVI, especially in patients with a lower LA roof height. In most cases, a drop in LET below 15°C occurred during PVI, especially of the LIPV; however, the percentage of patients in whom LET reached 15°C during LA roof line ablation was higher in those with GH than in those without. Moreover, many GH-related symptoms emerged 1 week after ablation rather than immediately afterward.