Get answers to your heart disease prevention questions.
There are no risks. No electricity is sent through the body, so there is no risk of shock.
The accuracy of the ECG depends on the condition being tested. A heart problem may not always show up on the ECG. Some heart conditions never produce any specific ECG changes.
If you have had a heart attack or have heart disease, you may need more than one ECG. Your doctor will tell you when you need the next one.
There is no reason for healthy people to have yearly ECG testing unless they have a family or personal history of specific heart diseases or other medical conditions that affect the heart.
Ganz L, Curtiss E. Electrocardiography. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 52.
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