Dr. Oen-Hsiao is the director of clinical cardiology at Yale Medicine. She is also an assistant professor of clinical cardiology at Yale School of Medicine. A graduate of Yale School of Medicine, she completed her internal medicine internship and residency at the Hospital of St. Raphael. She continued her training in cardiovascular diseases at the Hospital of St. Raphael. She is the director of cardiac rehabilitation at Yale New Haven Hospital-Heart & Vascular Center and is also medical director of the cardiac rehabilitation program and co-director of the pulmonary hypertension program at the YNHH-St. Raphael Campus. Her interests include general cardiology, preventive cardiology, women’s heart disease, cardiac rehabilitation, and pulmonary hypertension.