Nicholas Morrissey, MD

Dr. Roman Nowygrod is Professor of Surgery and specializes in Vascular Surgery including reconstructive arterial surgery, minimal access vascular surgery, surgical and medical management of venous disorders, renal transplantation and angioaccess. He received his undergraduate degree from Harvard University and his medical degree from Columbia University College of Physicians and Surgeons. He completed his general surgical residency at NewYork-Presbyterian/Columbia University Medical Center and a two year NIH research fellowship at the University of Minnesota where he earned a degree in Master of Science in experimental surgery. His research interests include prosthetic bypass graft modifications, improved techniques in bypass and venous surgery, coagulation management in vascular surgery and diseases, outcomes analyses in aortic, endovascular and peripheral vascular surgery and surgical education and training He is board certified in vascular surgery and general surgery. He is Director of the Vein disorder Treatment Center and Director of Columbia University Medical Student Surgical Education.

Dr. Thomas F.X. O'Donnell is a vascular surgeon in the Aortic Center at New York Presbyterian/Columbia University Irving Medical Center. He treats the full spectrum of vascular disease including advanced open and minimally invasive techniques for treating cerebrovascular, peripheral, and mesenteric disease with a special focus on complex aortic pathologies. After graduating the University of Notre Dame and subsequently Weill Cornell Medical College, Dr. O'Donnell completed his surgery residency at Massachusetts General Hospital, and a fellowship in vascular and endovascular surgery at Beth Israel Deaconess Medical Center. He spent two years as a Harvard-Longwood T32 Research fellow and completed the Harvard T.H. Chan School of Public Health's Program of Clinical Effectiveness. A surgeon-scientist, Dr. O'Donnell specializes in clinical outcomes research utilizing large databases. He has published over 50 manuscripts in peer-reviewed journals, two book chapters, and is a reviewer for several surgical journals. His research focuses on the optimal treatment strategies for aortic aneurysms and dissections.

Dr. Virendra I. Patel is the chief of vascular surgery at NewYork-Presbyterian/Columbia University Irving Medical Center. A vascular surgeon-scientist, Dr. Patel is highly skilled in the full range of vascular disorders that can lead to stroke, renal issues, intestinal problems, and peripheral arterial disease. Dr. Patel has a particular interest in clinical outcomes research and has served as principal investigator of several studies to evaluate open and minimally invasive repairs of complex aortic aneurysms. He participated in the TEVAR and EVAR Committees of the Vascular Quality Initiative of the Society of Vascular Surgery, and hel has also been a member of the Executive Council of the New England Society of Vascular Surgery and the Research Advisory Committee for the Society’s Vascular Study Group. A graduate of Tufts University School of Medicine, Dr. Patel completed his surgical residency and a research fellowship in vascular surgery at Beth Israel Deaconess Medical Center and was a clinical fellow in vascular and endovascular surgery at Massachusetts General Hospital. He earned a Master of Public Health at the Harvard T.H. Chan School of Public Health’s Program of Clinical Effectiveness.