An electrocardiogram, also called an EKG or ECG, is used to record the electrical activity of the heart. This test gives the provider a view of multiple angles of the heart's electrical activity and helps, along with other tests, to diagnose any abnormalities.

Electrocardiograms measure the rate and regularity of the patient's heartbeat. Abnormal heartbeats, enlarged or thickened heart chambers and, in some cases, damaged areas of the heart, can be detected by an electrocardiogram.

An electrocardiogram is usually performed by placing 10 recording leads on the patient’s body - 1 on each arm, 1 on each leg, and 6 on the chest, surrounding the heart. The patient rests on his or her back while the leads produce a graphic record of the electrical activity of the heart.

An electrocardiogram takes only a few minutes, is painless and causes no side effects.