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Preoperative cardiac computed tomography (CT) reveals a left atrial band adhering from the atrial septum to the posterior wall of the left atrium (A: axial section; B: inner view). A SoundStar intracardiac echocardiography (ICE) catheter (Biosense Webster, Diamond Bar, CA) was used to merge the left atrium and left atrial band before the transseptal puncture (C: ICE; D: CT merge). RIPV = right inferior pulmonary vein; RSPV = right superior pulmonary vein.
