John D. Day, MD, graduated from medical school at Johns Hopkins University. He did his residency and cardiac electrophysiology fellowship training at Stanford University. Dr. Day is an electrophysiologist at the Intermountain Medical Center Heart Institute in Salt Lake City, Utah. He previously served as president of the Heart Rhythm Society and currently serves as the Utah Governor of the American College of Cardiology. He is recognized as an international thought leader on atrial fibrillation management. Dr. Day is board certified in cardiology, and cardiac electrophysiology. He has published more than 100 manuscripts, abstracts, and book chapters and regularly lectures both nationally and internationally on heart rhythm disorders. Dr. Day is the former editor-in-chief of the Journal of Innovations in Cardiac Rhythm Management. In 2017, Dr. Day published The Longevity Plan: Seven Life-Transforming Lessons from Ancient China, with HarperCollins as publisher. The Longevity Plan was an Amazon number one bestseller and was named best books of 2017 by the Huffington Post and won the Nautilus Book Award Gold Medal for the best book of 2017.