1. Division of Cardiology Uwajima City Hospital 1‐1 Goten‐machi Uwajima Ehime 798‐8510 Japan
2. Department of Fundamental and Clinical Nursing Ehime University Graduate School of Medicine Toon Japan
3. Division of Radiology Ehime University Graduate School of Medicine Toon Japan
4. Tokyo Heart Rhythm Clinic Tokyo Japan
5. Division of Cardiology, Department of Integrated Medicine and Informatics Ehime University Graduate School of Medicine Toon Japan