1. From the Division of Cardiology (Y.K., T.T., K.I., Y.O.), Cardiovascular Surgery (K.M., H.O.), Radiology (M.H.), and Pathology (H.I.), National Cardiovascular Center, Osaka, Japan; Division of Cardiology, Hokusetsu General Hospital, Takatsuki, Japan (I.M.); and Division of Cardiology, Central Hospital, Hiroshima, Japan (A.K.).