School of Medicine


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  • Sneha Shah Jain MD, MBA

    Sneha Shah Jain MD, MBA

    Clinical Assistant Professor, Medicine - Cardiovascular Medicine

    BioDr. Sneha S. Jain is a Clinical Assistant Professor in the Division of Cardiovascular Medicine. She specializes in general cardiovascular medicine and preventive cardiology.

    She received her MD from the Johns Hopkins School of Medicine and her MBA from Harvard Business School. She graduated with distinction from Duke University with a BS in Economics. She completed internal medicine resident training at Columbia/NewYork-Presbyterian, during which time she was selected as a Silverman Fellow in Healthcare Innovation. In this capacity, she worked with clinical and data science partners to build and deploy the technological infrastructure to identify patients with certain cardiac conditions earlier in the course of their disease. She subsequently pursued fellowship training in cardiovascular medicine at Stanford University prior to joining faculty.

    Her research focuses on the development and responsible evaluation of AI to augment healthcare delivery and improve patient outcomes in cardiology. She works with the Stanford Center for Clinical Research and the Data Science Team at Stanford to deploy and prospectively evaluate AI solutions across the healthcare enterprise.

  • Siddhartha Jaiswal

    Siddhartha Jaiswal

    Associate Professor of Pathology

    Current Research and Scholarly InterestsWe identified a common disorder of aging called clonal hematopoiesis of indeterminate potential (CHIP). CHIP occurs due to certain somatic mutations in blood stem cells and represents a precursor state for blood cancer, but is also associated with increased risk of cardiovascular disease and death. We hope to understand more about the biology and clinical implications of CHIP using human and model system studies.

  • Roy Mattathu John, MD, PhD, FRCP

    Roy Mattathu John, MD, PhD, FRCP

    Clinical Professor, Medicine - Cardiovascular Medicine

    BioDr. John is a fellowship-trained cardiologist with more than 25 years of experience. He is a clinical professor in the Department of Medicine at Stanford University School of Medicine.

    He originally earned board certification in clinical cardiac electrophysiology in 1996 and has continued to recertify. He also has earned board certification in cardiovascular disease and internal medicine.

    Dr. John diagnoses and manages all forms of cardiac arrhythmias including atrial fibrillation and ventricular arrhythmias. His special interests include catheter ablation for SVT, atrial arrhythmias, pacemaker and defibrillator implants, and lead extraction.

    He has conducted extensive research. He has participated in large multi-center clinical trials, including over 30 studies as a primary investigator of drugs, devices, and ablation techniques. He helped pioneer a new way to manage scar-related ventricular tachycardia. He also helped develop innovations in cardiac pacemaker technology.

    Dr. John has authored over 200 publications that include 126 original research papers. They have appeared in reputed journals such as the New England Journal of Medicine, Circulation, Lancet, Journal of the American College of Cardiology, European Heart Journal, Heart Rhythm, Journal of Cardiovascular Electrophysiology, and many more. Topics have included innovative, new techniques and technologies for the treatment of supraventricular arrhythmias, atrial fibrillation, ventricular tachycardia, catheter ablation, lead extraction, cardiac pacing, and defibrillation.

    He was a member of the editorial board for Circulation and is currently on the editorial board of the publications Heart Rhythm Journal, Arrhythmia and Electrophysiology, Journal of Cardiac Electrophysiology, and Journal of Innovations in Cardiac Rhythm Management.

    Dr. John also has written several chapters for medical textbooks such as Harrison’s Principles of Internal Medicine, Zipes Textbook on Cardiac Electrophysiology - Cell to Bedside, Conn’s Current Therapy, Electrical Disorders of the Heart, Cardiac Mapping, and many more.

    He has made invited presentations to his peers at scientific sessions of the Heart Rhythm Society, American Heart Association, American College of Cardiology, and Heart Failure Society. He has delivered more than 60 national and international lectures. Subjects include cardiac pacing, defibrillation, heart failure, and arrhythmia management including catheter ablation for arrhythmias.

    Dr. John is a fellow of the American College of Cardiology, Heart Rhythm Society, and Royal College of Physicians of London.

    He has volunteered his time and expertise to provide free cardiac care to underserved patients in Bolivia, India, and Kenya.