1. From the Departments of Cardiovascular Medicine (T.I., H.I., H.T., A.K., K.K., T.A.) and Pathology (Y.M.), Wakayama Medical University, Wakayama, Japan; and the Department of Medical Engineering (S.M., M.G.) and Division of Cardiology (K.Y.), Kawasaki Medical School, Okayama, Japan.