
Professor & Chief,
Division of Adult Cardiothoracic Surgery

Dr. Wieselthaler is one of the world's foremost experts in mechanical circulatory support for end-stage heart failure patients and a medical innovator in ventricular assist device (VAD) systems.
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Scot H. Merrick, M.D. is the UCSF Helen and Charles Schwab Distinguished Professor and Chief of the Division of Adult Cardiothoracic Surgery.
Dr. Merrick received his M.D. with Honors from the
University of Washington School of Medicine and completed his
General Surgery and Cardiothoracic residencies at the University of
California, San Francisco (UCSF). Dr. Merrick is certified by the
American Board of Surgery, American Board of Thoracic Surgery and
American Board of Surgery, Surgical Critical Care. His special
interest is in surgery of the mitral valve and he is one of the
leading experts in homograft mitral valve replacement and mitral
valve repair.
Dr. Merrick is a fellow of the American College of Cardiology
and the American College of Surgeons. He is an active member of the
Northern California Chapter of the American College of Surgeons,
Society of Thoracic Surgeons, Western Thoracic Surgical Society,
Naffziger Surgical Society, San Francisco Surgical Society, Pacific
Coast Surgical Association, Club Mitrale, Bay Area Thoracic
Surgeons and the American Heart Association. In addition, Dr.
Merrick has served on the Emergency Cardiac Care Committee of the
American College of Cardiology and on the program committee of the
Western Thoracic Surgical Association. Highly respected by
his peers, Dr. Merrick was named to the list of U.S. News
"America's Top Doctors," a distinction reserved for the top 1% of
physicians in the nation for a given specialty.
In its most recent survey, U.S. News in collaboration with Castle Connolly Medical Ltd. listed twenty-five (25) surgeons in the UCSF Department of Surgery, nearly one-third (1/3) of the clinical faculty, on the list of U.S. News "Top Doctors". The list, compiled from the opinion of colleagues, denotes the top 10% of physicians within a region practicing a given specialty. Fifteen of the 25 department surgeons were also named by their peers to the list of America's Top Doctors (ATD), a distinction reserved for the top 1% of physicians in the nation for that specialty. The listings are published online at U.S. News. The group rankings are intended to guide patients in selecting a doctor and physicians in making specialty referrals.