Many things can make your heart beat faster than normal, including anxiety, excitement, fear or exertion. However, if your heart starts beating rapidly for no apparent reason, you may have a type of heart rhythm disorder called tachycardia. In this video, San Diego Health host Susan Taylor talks with David Cork, MD, a cardiologist at Scripps Clinic Torrey Pines, about what causes tachycardia and why it is a concern. Learn more: https://www.scripps.org/7433p