Affiliation: | 1. Heart Rhythm Center, Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan;2. Division of Cardiology, Department of Medicine, Hualien Tzu Chi Hospital, Hualien, Taiwan;3. Institute of Clinical Medicine and Cardiovascular Research Institute, National Yang Ming Chiao Tung University, Taipei, Taiwan;4. Cardiovascular center, Taichung Veterans General Hospital, Taichung, Taiwan |