An electrocardiogram, or ECG, is a simple, painless test that records the electrical activity of your heart. The electrical activity is recorded as a series of waves on a graph. The ECG can be used to detect a variety of heart problems, including irregular heartbeats, heart damage, heart blockages, and heart valve problems.

The test is performed by attaching electrodes to your chest, arms, and legs. The electrodes detect the electrical impulses that are produced by your heart. The impulses are then sent to a machine that records them on a graph. An ECG is a very versatile test that can be used in a variety of settings, including doctor’s offices, hospitals, ambulances, and home monitoring.