During the test
The test is usually done in the doctor's office or in a hospital by a technician. It takes 5 to 10 minutes to complete.
About 12 to 15 small electrodes or leads will be attached to your arms, legs, and chest to detect electrical currents of your heart. These leads will carry the electrical signals of your heart to a machine, which will trace the signals on paper as waves. A special ECG paste or pad may be attached to the leads in improve conductivity.
Hairy areas on your body may be shaved as necessary. You will be asked to breathe normally and stay still. You should not talk during the test.
After the test
You will be able to return to your normal daily activities right after the test. The results of the test will be interpreted by a doctor and be discussed with you.
Since this test is done while you are resting, it may not be able to catch problems that only show up occasionally or during stress. Therefore, your doctor may order variations of the ECG, such as Holter monitoring, event recorder, or a stress test.
Depending on your test results, your doctor may order additional tests for you.