Jag Singh, MD, DPhil is a Professor of Medicine at Harvard Medical School. He served as the Clinical Director of the Cardiology Division and the Roman W. DeSanctis Endowed Chair in Cardiology from 2015-2020. He is also the Founding Director of the Resynchronization and Advanced Cardiac Therapeutics Program, at the Massachusetts General Hospital Heart Center. Dr. Singh received his medical degree from BJ Medical College, Pune University, India. He completed his internal medicine residency, cardiology and cardiac electrophysiology fellowships at Mass General. He also earned a doctorate from Oxford University, a master of science in clinical investigation from MIT-Harvard and a research fellowship at the Framingham Heart Study.

Dr. Singh's research interests are in clinical cardiac electrophysiology. Dr. Singh is the national & global principal investigator on 5 ongoing multi-center clinical trials in device therapy for heart failure and catheter ablation for atrial fibrillation. He is also a member of several steering committees for multicenter research studies. Much of his other efforts are focused on the delivery of cardiovascular care while adapting to health care reform, population health initiatives and furthering the digital footprint of the Heart Center. Dr. Singh is on the editorial board of several medical journals, Deputy Editor of the Journal of American College of Cardiology: Clinical EP and editor-in-chief of the Current Treatment Options in Cardiovascular Medicine. Dr. Singh is an internationally recognized speaker and frequently gives lectures at national/ international educational forums. Dr. Singh has over 300 publications inclusive of original research articles, text book chapters, review articles and editorials. He has edited a Textbook on Imaging in Electrophysiology.