Dr. John S. Gregg

George Jabbour, MD, specializes in cardiology and is certified in echocardiography, cardiovascular disease, interventional cardiology, and nuclear cardiology by the National Board of Echocardiography. He practices at UPMC Altoona Blair Medical Associates (Cardiology) and UPMC Pleasant Valley Cardiology and is affiliated with UPMC Altoona, UPMC Presbyterian, UPMC Shadyside, and UPMC Bedford. Dr. Jabbour completed his residency at Staten Island University Hospital. Dr. Jabbour is rated as a Distinguished provider by MediFind in the treatment of Heart Attack. His top areas of expertise are Heart Attack, Necrosis, Angina, Transcatheter Aortic Valve Replacement (TAVR), and Aortic Valve Replacement.

Catalin Toma, MD, is an interventional cardiologist and is certified in cardiovascular disease and interventional cardiology by the American Board of Internal Medicine. He currently serves as director of interventional cardiology for the Heart and Vascular Institute and director of the Interventional Fellowship at UPMC. He is an assistant professor of medicine at the University of Pittsburgh School of Medicine. He received his medical degree from Grigore T. Popa University of Medicine and Pharmacy in Iasi, Romania. Following a post-doctoral fellowship at Johns Hopkins in Baltimore, he completed an internal medicine residency at St. Luke’s Roosevelt Hospital Center in New York City and a fellowship in cardiovascular disease and interventional cardiology at UPMC. Dr. Toma joined the UPMC Heart and Vascular Institute in 2007. He currently leads the Chronic Total Occlusion Program as well as the Pulmonary Vascular Interventional Program at UPMC Presbyterian Hospital. He is an integral part of the Structural Heart Program with interests in the aortic and tricuspid space. Additional interests include intracoronary imaging and mechanical circulatory support. Dr. Toma has had an extensive amount of publications and presentations over his career, has several invention patents, and serves as a clinical study leader at local and national levels. View Dr. Toma's full list of publications from PubMed. Dr. Toma is rated as a Distinguished provider by MediFind in the treatment of Heart Attack. His top areas of expertise are Pulmonary Embolism, Acute Coronary Syndrome, Heart Attack, Percutaneous Coronary Intervention (PCI), and Aortic Valve Replacement.

Medhat Zaher is a Cardiologist in Johnstown, Pennsylvania. Dr. Zaher is rated as a Distinguished provider by MediFind in the treatment of Heart Attack. His top areas of expertise are Heart Attack, Coronary Heart Disease, Apoplexy, and Necrosis.