^○Toshiyuki Yamada^1,3, Motohiko Osako¹, Hideyuki Shimizu³, Hisao Suda⁴, Shuichiro Takanashi² (1.National Hospital Organizaton Tokyo Medical Center Department of Cardiovascular Surgery, 2.Sakakibara Heart Institute Department of Cardiovascular Surgery, 3.Keio Univercity Department of Cardiovascular Surgery, 4.Nagoya City Univercity Department of Cardiovascular Surgery)

^○Kojiro Furukawa¹, Eiki Tayama¹, Takeshi Ontsuka¹, Tomohiro Ueda¹, Yuichiro Hirata¹, Hikaru Uchiyama¹, Shigeki Morita¹, Akira Shiose² (1.Kyushu medical Center, 2.Kyushu University)

^○Kazufumi Yoshida, Hirofumi Fujii, Shigeki Koizumi, Ken Nakamura, Masanosuke Ishigami, Atsushi Nagsawa, Tadaaki Koyama (Kobe City Medical Center General Hospital)

^○Akihiro Yoshimoto, Takaharu Shimizu, Daisuke Arima, Satoshi Nishi, Sei Morizumi, Yoshihiro Suematsu (Tsukuba Memorial Hospital)