Dr. John Day graduated from medical school at Johns Hopkins University. He did his residency in internal medicine, cardiology, and cardiac electrophysiology fellowship training at Stanford University.

Dr. Day currently serves as the physician executive of cardiovascular services for the Mountain Star HCA Healthcare System. He has a busy cardiac electrophysiology practice at St. Mark’s Hospital in Salt Lake City, Utah. He previously served as president of the Heart Rhythm Society and is the immediate past president of the Utah chapter 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 Harper Collins as publisher. The Longevity Plan was an Amazon number one best seller 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. Dr. Day’s second book, The Atrial Fibrillation Cure, will be published on February 16, 2021 by BenBella Books.