As health system director of Interventional Cardiology at Penn Medicine, Howard Herrmann, MD, specializes in coronary artery disease, valvular heart disease, coronary stents, mitral valve disease, aortic valve disease, hypertrophic obstructive cardiomyopathy, atrial septal defects and patent foramen ovale. Dr. Herrmann is one of the leading interventional cardiologists in the nation advancing the field of transcatheter therapies for valvular disease. His research expertise lies in clinical trials, new devices and drugs in interventional cardiology. Dr. Herrmann completed his medical degree at Harvard Medical School and his residency and fellowship at Massachusetts General Hospital. He is board certified in internal medicine, cardiovascular diseases and interventional cardiology. He also serves as director of the cardiac catheterization laboratories at the Hospital of the University of Pennsylvania, and is the John Winthrop Bryfogle Professor of Cardiovascular Diseases.