Hiroyuki IWANO^1,2, Yoji TAMAKI³, Michito MURAYAMA^2,4 (1.Division of Cardiology, Teine Keijinkai Hospital, 2.Diagnostic Center for Sonography, Hokkaido University Hospital, 3.Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine,, Hokkaido University, 4.Hokkaido University, Faculty of Health Sciences)

Satoshi YAMADA (Department of Cardiology, Tokyo Medical University Hachioji Medical Center)

Megumi SHIMADA¹, Eriko GOTO², Hideki OZAWA² (1.Tokyo Metropolitan Matsuzawa Hospitaal, 2.Department of General Internal Medicine, Tokai University School of Medicine)

Takahiro OHARA (Division of Geriatric and Community Medicine, Tohoku Medical and Pharmaceutical University)

Yukina HIRATA¹, Hirotsugu YAMADA², Natsumi YAMAGUCHI¹, Sae MORITA¹, Asami YUASA¹, Rikizou MATUSMOTO¹, Masami YAMAO¹, Susumu NISHIO¹, Kenya KUSUNOSE³, Masataka SATA³ (1.Ultrasound Examination Center, Tokushima University Hospital, 2.Department of Cardiovascular Medicine, Tokushima University Hospital, 3.Department of Cardiovascular Medicine, Tokushima University Hospital)

Toru YAMADA (Department of General Medicine, Tokyo Medical and Dental University)