Even in this time of uncertainty, Mayo Clinic is a place for hope and healing — and we're delivering the care you need. Mayo Clinic follows carefully designed, rigorously enforced safety precautions for anyone who needs face-to-face care. We're safely treating all patients, both in person and through virtual visits, in adherence with federal and state executive orders and guidance. John M. Stulak, M.D., is a cardiovascular surgeon and Professor of Surgery in the Department of Cardiovascular surgery at Mayo Clinic in Rochester, MN. His primary clinical interests include arrhythmia surgery (Maze procedure), ascending aortic aneurysm, cardiac tumors, coronary artery disease, heart transplantation, mechanical circulatory support (left ventricular assist device, total artificial heart, ECMO), pericardial disease, and valvular heart disease. In addition to his clinical activities, Dr. Stulak is active in outcomes research and national clinical trials.