EKG

EKG, or electrocardiogram, is a test that measures your heart's electrical activity and thus helps your doctor determine your heart's health. An EKG can assess heart damage and disease, and is almost routine in persons over 40.

How it works

The EKG is a test that records electrical signals from your heart onto a paper strip. The pattern of these signals can tell the physician whether your heart is normal, under stress, or experiencing electrical problems, strain or damage.