Dr. Calkins, Director of the Electrophysiology Laboratory and Arrhythmia Service at Johns Hopkins Hospital and The Nicholas J. Fortuin M.D. Professor of Cardiology, is internationally recognized as an expert on catheter ablation, atrial fibrillation, syncope, and arrhythmia management. Dr. Calkins has published more than 600 articles and book chapters on a large variety of cardiac arrhythmias. His research has focused predominantly on catheter ablation, atrial fibrillation, syncope, and arrhythmogenic right ventricular dysplasia. Dr. Calkins has also written extensively on most aspects of heart rhythm disorders and their treatment. He was the lead author on the 2007, 2012, and 2017 Consensus Document on Catheter and Surgical Ablation of Atrial Fibrillation. He is a past President of the Heart Rhythm Society.