Joseph Woo, MD, is the Norman E. Shumway Professor and Chair of the Department of Cardiothoracic Surgery at Stanford University School of Medicine and holds a courtesy appointment in the Department of Bioengineering. He received his undergraduate degree from the Massachusetts Institute of Technology and his medical degree from the University of Pennsylvania, where he also conducted his postgraduate surgical training in General and Cardiothoracic Surgery and completed a postdoctoral research fellowship. Dr. Woo has an active clinical practice of 300 pump cases per year focusing on complex cardiac valve repair, aortic surgery, cardiopulmonary transplantation, and minimally-invasive surgery, and has advanced these fields by developing several innovative operations. He also directs basic research on stem cells, angiogenesis, tissue engineering, and biomechanics.