1. State Key Laboratory of Cardiovascular Disease, Arrhythmia Center (J.L., K.C., Y.D., Q.S., Y.L., Y.Z., R.C., Y. Jin, L.Y., S.Z.), Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.
2. State Key Laboratory of Cardiovascular Disease, Department of Echocardiography (Y. Jiang), Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.
3. Medtronic Inc, Cardiac Rhythm Heart Failure Division, Minneapolis, MN (X. Zhou, A.C.).
4. Medtronic (Shanghai) Ltd, Shanghai, China (X. Zhang).
5. Division of Cardiology, Medical University of South Carolina, Charleston (M.R.G.).