• What Is An Electrocardiogram?

    An electrocardiogram (e-lek-tro-KAR-de-o-gram), also called an EKG or ECG, is a simple, painless test that records the heart’s electrical activity. To understand this test, it helps to understand how the heart works.
    An EKG/ECG shows:

    • How fast your heart is beating
    • Whether the rhythm of your heartbeat is steady or irregular
    • The strength and timing of electrical signals as they pass through each part of your heart

    Doctors use EKG/ECGs to detect and study many heart problems, such as heart attacks, arrhythmias, and heart failure. The tests results also can suggest other disorders that affect heart function.