Dr. Roy Abrahamian

Dr. William (Bill) Warren is a cardiologist specializing in non-invasive and imaging cardiology. He is board-certified in Internal Medicine, Cardiovascular Disease, Nuclear Cardiology, and Echocardiography. Dr. Warren graduated summa cum laude from Princeton University, earned his Doctor of Medicine degree at Harvard Medical School, completed his internal medicine internship and residency at Massachusetts General Hospital, and finished a cardiology fellowship at Johns Hopkins Hospital. His areas of focus include a wide range of cardiovascular conditions and treatments, with expertise in non-invasive diagnostic studies.Since joining The Chattanooga Heart Institute in 2003, Dr. Warren has become a valued leader at CHI Memorial and in the Chattanooga medical community. He currently serves as managing partner of The Chattanooga Heart Institute, where he collaborates with over 30 colleagues. He previously chaired the CHI Memorial Board of Directors.Dr. Warren possesses a broad range of clinical interests and expertise. His dedication to patient care stems from a deep love of science combined with a genuine ability to connect with patients on a personal level. The complexity and diverse treatment options within cardiovascular care drew him to this field, allowing him to help critically ill patients recover and thrive. He was the recipient of CHI Memorial’s inaugural St. Luke’s Healer’s Heart award which recognizes physicians and providers for demonstrating compassion, inclusion, integrity, excellence and collaboration.Dr. Warren's commitment extends beyond clinical practice. He has conducted research studies which have been published in prestigious journals including the American College of Cardiology Current Journal Review, Circulation, Journal of Infectious Diseases, Journal of Clinical Microbiology, and Journal of Clinical Research.Away from work, Dr. Warren enjoys nature photography and travel. He has visited all seven continents. Dr. Warren is rated as a Distinguished provider by MediFind in the treatment of Thoracic Aortic Aneurysm. His top areas of expertise are Coronary Heart Disease, Atherosclerosis, Angina, Pacemaker Implantation, and Heart Bypass Surgery.

Ezad Ahmad is a Cardiologist in Dalton, Georgia. Dr. Ahmad is rated as a Distinguished provider by MediFind in the treatment of Thoracic Aortic Aneurysm. His top areas of expertise are Angina, Adenosine Deaminase 2 Deficiency, Heart Attack, Metabolic Syndrome, and Pacemaker Implantation.

Dr. Mark Thel graduated with Distinction from the University of Virginia and cum laude from Georgetown University School of Medicine. At Georgetown, he was president of the Honor Medical Society Alpha Omega Alpha. He served his internship, internal medicine residency, cardiology fellowship, and interventional training at Duke where he was also the Chief Resident in the Department of Medicine. He received the Duke Medical School Davison Society teaching award in 1996.Dr. Thel has published more than 25 papers focusing on clinical trials in interventional cardiology. Dr. Thel participated in the United States Navy Health Professions Scholarship Program and left the Navy in 2000 as a Commander. His duty stations included General Medical Officer for Carrier Air Group Five in Atsugi, Japan, and staff cardiologist at the National Naval Medical Center in Bethesda, MD. Dr. Thel is a Diplomate of the National Board of Medical Examiners and is board certified in internal medicine, cardiology and interventional cardiology. He is a Fellow of the American College of Cardiology. Dr. Thel is rated as a Distinguished provider by MediFind in the treatment of Thoracic Aortic Aneurysm. His top areas of expertise are Coronary Heart Disease, Atherosclerosis, Angina, Transcatheter Aortic Valve Replacement (TAVR), and Aortic Valve Replacement.