An electrocardiogram (ECG) records your heart’s electrical activity with each heartbeat. With it, your doctor can see whether the rhythm is regular, how fast your heart is beating, and whether there are signs that part of the heart muscle is not getting enough blood.
It is one of the most common tests in cardiology because it is quick, doesn’t hurt and has no risks. We do it for adults and children.
If you have questions about your result after the test, see how to get your results and medical records or ask your doctor at your next visit.
Your test, step by step
Before
- Wear comfortable clothes that make it easy to uncover your chest.
- On the day of the test, don't put creams or oils on your chest, arms or legs. The electrodes stick better to clean skin.
- Bring your doctor's order, your ID, your health insurance card and the insurer's authorization, if you were asked for one.
During
- You lie down on an exam table, and the staff place some electrodes (small stickers) on your chest, arms and legs.
- Stay still and breathe normally. The recording takes just a few minutes.
- The machine does not send any electric current into your body. It only reads the signals your heart already makes.
After
- The electrodes are removed, and you can go back to your activities right away.
- Your doctor reviews the result and explains what it means for you.
Questions to ask your doctor
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My questions about Electrocardiogram (ECG)