Dr. Onaje D. Greene

Dr. Doughan received his medical degree from the American University of Beirut in Lebanon, where he also completed his internship. From Lebanon, he came to Emory University School of Medicine in 2002 to complete his internal medicine residency and cardiology fellowship. Dr. Doughan is board certified by the American Board of Internal Medicine in internal medicine and cardiovascular disease. He is also board certified in Nuclear Cardiology and Cardiovascular Computed Tomography (CT) and Testamur of the National Board of Echocardiography. Dr. Doughan is rated as a Distinguished provider by MediFind in the treatment of Pulmonary Embolism. His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Hypertension, Pulmonary Edema, Heart Failure, and Pacemaker Implantation.

Dr. Patel earned his undergraduate and medical degree from Medical University of Lublin, Poland. He completed his internal medicine internship/residency at St. Elizabeth's Medical Center/ Tufts University in Boston, MA. Following his residency, he completed an advanced echocardiography fellowship at West Roxbury VA Medical Center in Boston, MA.Dr. Patel completed his cardiology fellowship training at University of Massachusetts- Baystate Medical Center. He subsequently completed an advanced cardiac imaging fellowship in CT/MRI at The Ohio State University.Dr. Patel is board certified in Internal Medicine, Cardiovascular Medicine, Echocardiography, Vascular Medicine, Nuclear Cardiology and Cardiac MRI. Dr. Patel is a fellow of the American College Of Cardiology and is a member of the American Medial Association, American Society of Echocardiography and American Society of Nuclear Cardiology.Dr. Patel enjoys all sports as well as traveling with his family. Dr. Patel comes to Piedmont Heart with eight years of medical experience. He welcomes new patients and accepts most insurance plans. Dr. Patel is rated as a Distinguished provider by MediFind in the treatment of Pulmonary Embolism. His top areas of expertise are Heart Attack, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Neurocardiogenic Syncope.

David Tian, M.D., received his medical degree from New York Medical College where he was inducted into the Alpha Omega Alpha medical honor society. He completed his internal medicine residency at Johns Hopkins Hospital and his cardiology fellowship at Boston University Medical Center, where he was chief fellow. Dr. Tian is a board eligible cardiologist, board certified internist and a member of the American Medical Association, American Heart Association and American College of Cardiology. He has specialized training in echocardiography, nuclear, and cardiac MRI. Dr. Tian has a special interest in cardiac research and has multiple publications in various medical journals. Dr. Tian is fluent in English and Mandarin Chinese. His philosophy on medicine has always been about creating an equal partnership between patient and physician. Having been a cardiac patient himself at a very young age, he is very aware of how important it is to not just treat the disease, but to treat the patient. When he is not taking care of patients, Dr. Tian enjoys spending time with his family and his Goldendoodle. Dr. Tian is rated as a Distinguished provider by MediFind in the treatment of Pulmonary Embolism. His top areas of expertise are Atrial Fibrillation, Heart Failure with Preserved Ejection Fraction (HFpEF), Atherosclerosis, Angina, and Pacemaker Implantation.