Dr. Elmariah graduated from the University of Pennsylvania School of Medicine and completed his internal medicine residency training at the Hospital of the University of Pennsylvania. He subsequently served as Chief Medical Resident at Lankenau Hospital. Dr. Elmariah completed his fellowship in cardiovascular medicine at the Mount Sinai Hospital in New York where he also served as Chief Fellow. While a fellow, he also completed a Masters in Public Health at the Harvard School of Public Health. Dr. Elmariah completed further fellowship training in interventional cardiology and structural heart disease at the Massachusetts General Hospital.

His clinical interest is in the management of valvular heart disease, coronary artery disease, and adult congenital heart disease. He performs transcatheter valve replacement, percutaneous coronary interventions (stents), and transcatheter closure of patent foramen ovale (PFO) and atrial septal defects (ASD).

Dr. Elmariah has a specific research interest in valvular heart disease. In addition to ongoing clinical investigation of valve calcification and the progression of aortic stenosis, Dr. Elmariah is evaluating the impact of transcatheter aortic valve replacement on myocardial metabolism and myocardial remodeling. Dr. Elmariah is an MGH Heart Center Hassenfeld Research Scholar and has been awarded the Jeremiah Stamler Distinguished Young Investigator Award and an American College of Cardiology Young Investigator Award.