Modified incisions used during the patient’s surgery. (B) An additional septal incision can facilitate exposure of the mitral valve. (B, C) A left atrial incision (solid arrow) would not provide as much visibility of the mitral valve as the modified septal incision (double arrow). Thus, the latter was used to maximize the surgeon’s view during the procedure. These incisions also were used for the modified Cox-Maze III operation. IVC: inferior vena cava; SVC: superior vena cava.