Takekuni Hayashi1, Takeshi Mitsuhashi2, Shin-ichi Momomura2. 1. Division of Cardiovascular Medicine, Saitama Medical Center, Jichi Medical University, 1-847, Amanuma, Oomiya-ku, Saitama 330-8503, Japan hayahsi1979@yahoo.co.jp. 2. Division of Cardiovascular Medicine, Saitama Medical Center, Jichi Medical University, 1-847, Amanuma, Oomiya-ku, Saitama 330-8503, Japan.