(A) DFs at the 17 mapped sites (⁎P<0.05). (B) OI at the 17 mapped sites. (⁎P<0.05 versus OI at the RAA, †P<0.05 versus OI at the LAA). (C) Voltage at the 17 mapped sites (⁎P<0.05 versus voltage at the RAA, †P<0.05 versus voltage at the LAA, ‡P<0.05 versus voltage at the RA lateral wall, §P<0.05 versus voltage at the mitral isthmus and P<0.05 versus voltage at the CS, ∮P<0.05 versus voltage at the CTI). CS=coronary sinus; CTI=cavotricuspid isthmus; DF=dominant frequency; LA=left atrium; LAA=left atrial appendage; LIPV=left inferior pulmonary vein antrum; LSPV=left superior pulmonary vein antrum; MI=mitral isthmus; RA=right atrium; RAA=right atrial appendage; RIPV=right inferior pulmonary vein antrum; RSPV=right superior pulmonary vein antrum.