[1] Yokkaichi Social Insurance Hosp, Dept Cardiol, Yokaichi, Japan
[2] Mie Univ, Grad Sch Med, Dept Cardiol & Nephrol, Tsu, Mie 514, Japan
[3] Yokkaichi Social Insurance Hosp, Yokaichi, Japan
[4] Mie Univ, Grad Sch Med, Dept Clin Cardiovasc Rsch, Tsu, Mie 514, Japan