Division of Cardiology, Yonsei University Health System, Seoul, Republic of Korea.|Division of Cardiology, Yonsei University Health System, Seoul, Republic of Korea.|Division of Cardiology, Yonsei University Health System, Seoul, Republic of Korea.|Division of Cardiology, Yonsei University Health System, Seoul, Republic of Korea.|Division of Cardiology, Yonsei University Health System, Seoul, Republic of Korea.|Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, Kangwon-do, Republic of Korea.|Division of Cardiology, Yonsei University Health System, Seoul, Republic of Korea.