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 heart’s health.

An electrocardiogram — also called ECG or EKG — is often done in a health care provider’s office, a clinic or a hospital room. ECG machines are standard equipment in operating rooms and ambulances. Some personal devices, such as smart watches, offer ECG monitoring. Ask your health care provider if this is an option for you.

You may need an ECG if you have any of the following signs and symptoms:

1. Chest pain
2. Dizziness, lightheadedness or confusion
3. Heart palpitations
4. Rapid pulse
5. Shortness of breath
6. Weakness, fatigue or a decline in ability to exercise