Akira Ueno1, Norishige Morita2, Yoshinori Kobayashi2. 1. Division of Cardiology, Department of Medicine, Tokai University Hachioji Hospital, 1838 Ishikawa-machi, Hachioji-shi, Tokyo 1920032, Japan s4013@nms.ac.jp. 2. Division of Cardiology, Department of Medicine, Tokai University Hachioji Hospital, 1838 Ishikawa-machi, Hachioji-shi, Tokyo 1920032, Japan.