He has authored and co-authored over 355 papers in peer reviewed journals, edited over 15 textbooks and 200 review articles and editorials. He has served on several NIH panels, steering committees for NIH and industry sponsored trials as well as the Data Safety and Monitoring Boards for many trials. He has served on multiple electrophysiology committees for the American Heart Association, American College of Cardiology and the Heart Rhythm Society. He has contributed to research in catheter ablation of atrial fibrillation, hybrid ablation, and phhysiologic pacing. He has served on the Editorial Board and as a Senior Editor of Circulation: Arrhythmia and Electrophysiology, Heart Rhythm, Journal of the American College of Cardiology and Pacing and Clinical Electrophysiology.