Gregory Trachiotis, MD, is a Professor of Surgery and Chief of Cardio-Thoracic Surgery at The George Washington University Medical Center, Chief of Cardiac Surgery, at The Veterans Affairs Medical Center/Capitol VISN-5 Network, in the Division of Cardiothoracic Surgery, Department of Surgery at the George Washington University Hospital. His clinical and surgical interests include end-stage heart and lung disease, video-assisted thoracic surgery (VATS), lung cancer, coronary artery disease, aortic and mitral valvular disease, off-bypass coronary revascularization, mini-pump technology and surgery for heart failure, including mechanical assist devices, esophageal cancer and motility disorders, transcatheter valve replacement (TAVR).