Raphael Sung, MD, is a cardiac electrophysiologist at National Jewish Health. Dr. Sung is in the Division of Cardiology and Department of Medicine. Clinical Interests: My clinical interest spans all of cardiac electrophysiology, dealing with slow and fast heart rhythm problems. My clinical expertise includes all cardiac device implantations related to heart rhythm disturbances, as well as a comprehensive list of cardiac ablations (cauterization) to improve or cure arrhythmias occurring in both the top and bottom parts of the heart (including atrial fibrillation and ventricular tachycardias).