Dr. Bartley Griffith

Jennifer S. Lawton, M.D., is the Richard Bennett Darnall Professor of Surgery and chief of the Johns Hopkins Division of Cardiac Surgery, as well as director of the Cardiac Surgery Research Laboratory. Dr. Lawton’s clinical area of focus is adult cardiac surgery. She also leads the division’s residency education program, and conduct research in myocyte volume regulation and ATP-sensitive K channels. She has held important leadership roles in several organizations, including chair of the surgery study section of the American Heart Association, vice-chair of the ACGME residency review committee, and president of the Women in Thoracic Surgery. Lawton’s achievements also include 81 peer-review publications, 7 book chapters, and 18 abstracts. She has delivered over 50 invited lectures. Dr. Lawton is rated as a Distinguished provider by MediFind in Heart Bypass Surgery. Her top areas of expertise are Heart Tumor, Aortic Dissection, Atrial Myxoma, Heart Bypass Surgery, and Coronary Artery Bypass Graft (CABG).

Niv Ad is a Thoracic Surgeon in Takoma Park, Maryland. Dr. Ad is rated as a Distinguished provider by MediFind in Heart Bypass Surgery. His top areas of expertise are Mitral Valve Regurgitation, Aortic Valve Stenosis, Hypertrophic Cardiomyopathy (HCM), Heart Bypass Surgery, and Coronary Artery Bypass Graft (CABG).

Alan Speir is a Thoracic Surgeon in Fairfax, Virginia. Dr. Speir is rated as a Distinguished provider by MediFind in Heart Bypass Surgery. His top areas of expertise are Thoracic Aortic Aneurysm, Aortic Dissection, Cystic Medial Necrosis of Aorta, Coronary Artery Bypass Graft (CABG), and Heart Bypass Surgery.