An electrocardiogram records the electrical signals in the heart. It’s a common and painless test used to quickly detect heart problems and monitor the health of a patient’s heart.

An electrocardiogram (EKG) is a painless, noninvasive way to help diagnose many common heart problems. A physician might use an electrocardiogram to determine or detect for abnormalities such as irregular heart rhythms (arrhythmias), blocked or narrowed arteries in the heart (coronary artery disease), or evidence of a previous heart attack.