Dr. Gregory C. Robertson

Ryan K. Crisel, M.D. obtained a Bachelor of Science in mechanical engineering from Rose-Hulman Institute of Technology. He received a medical degree from Emory University School of Medicine in Atlanta, Ga. Dr. Crisel completed internal medicine residency in the department of medicine at the University of California-San Francisco. Dr. Crisel then completed a fellowship in cardiovascular medicine at Northwestern University. Dr. Crisel joins Piedmont Heart after recently completing a fellowship in interventional cardiology at Emory University. He is board certified in internal medicine, cardiovascular medicine, echocardiography, nuclear cardiology, and physician's vascular interpretation. Dr. Crisel is a member of the American College of Cardiology and the American Medical Association. In his spare time, Dr. Crisel enjoys playing basketball, downhill skiing and hiking. Dr. Crisel welcomes new patients and accepts most insurance plans. Dr. Crisel is rated as a Distinguished provider by MediFind in the treatment of Atrial Myxoma. His top areas of expertise are Heart Attack, Angina, Coronary Heart Disease, and Atherosclerosis.

Steven Sigman, M.D. earned his undergraduate degree from Ohio State University and his medical degree from the Medical College of Ohio. He subsequently completed a medical residency and cardiology fellowships at Thomas Jefferson University Hospital, Philadelphia and Emory respectively. Following that he served as chief resident at Grady Memorial Hospital. Prior to joining Piedmont Heart Institute in 2009, Dr. Sigman was assistant professor of medicine (cardiology) at Emory University. Dr. Sigman is currently board certified in both cardiovascular diseases and nuclear cardiology. He currently serves as the Director of Nuclear Cardiology for Piedmont Hospital and the Piedmont Heart Institute. He also serves as a cardiology consultant both in the office and at Piedmont Hospital. His interests include diagnosis and management of coronary artery disease, valvular heart disease, vascular disease, and cardiac manifestations of complex medical conditions. Dr. Sigman is a Fellow of the American College of Cardiology, and the America Society of Nuclear Cardiology. He has authored or co-authored several publications and abstracts and frequently lectures on the topic of cardiac imaging. He lives in Atlanta with his wife, Carolyn H. Sigman M.D., and his 5 children. Dr. Sigman is rated as a Distinguished provider by MediFind in the treatment of Atrial Myxoma. His top areas of expertise are Pulmonary Edema, Heart Failure, Angina, Pacemaker Implantation, and Cardiac Ablation.

David Caras is a Cardiologist in Marietta, Georgia. Dr. Caras is rated as a Distinguished provider by MediFind in the treatment of Atrial Myxoma. His top areas of expertise are Heart Failure with Preserved Ejection Fraction (HFpEF), Heart Failure, Pulmonary Edema, Cardiac Ablation, and Pacemaker Implantation.