Naoya Otaka1, Toshiki Kawamiya2, Jun Ohno2. 1. Department of Cardiology, Matsuyama Red Cross Hospital, 1 Bunkyo-cho, Matsuyama-shi, Ehime, 790-8524, Japan. jacta_leaest0428@yahoo.co.jp. 2. Department of Cardiology, Tsushima City Hospital, Aichi, Japan.