John (Jack) Haney, M.D., M.P.H., is a transplant surgeon with the Lung Transplant Program within the Transplant Center and chair of the Department of Cardiothoracic Surgery at Mayo Clinic in Jacksonville, FL. Dr. Haney's primary clinical interests include adult cardiac surgery, heart valve surgery and replacement, coronary artery bypass surgery, aortic root and ascending aneurysm surgery, mechanical support, heart and lung transplantation, ECMO, and pulmonary endarterectomy for chronic thromboembolic pulmonary hypertension (CTEPH).