Eight-rayed stars indicate the ablation sites with a positive response to high-frequency stimulation (HFS). Round tags indicate the ablation sites without performing HFS. Dotted lesions were applied to the posterior wall at the each site.

LSPV = left superior pulmonary vein (PV); RSPV = right superior PV; LAA = left atrial appendage; RIPV = right inferior PV; LIPV = left inferior PV; MI, mitral isthmus; FO = foramen ovale; LOM = ligament of Marshall; CS = coronary sinus; IVC = inferior vena cava. Other abbreviations are the same as Figure 1 and 2.