Electrocardiography (ECG or EKG) is done to check the heartbeat. It shows how fast or how slow the heart is beating. ECG test results can help your care team diagnose:
An ECG also may be done to learn how well a pacemaker and heart disease treatments are working.
You may need an ECG if you have:
If you have a family history of heart disease, you may need an electrocardiogram to screen for heart disease, even if you don't have symptoms. Most heart doctors consider an ECG as a basic tool to screen for heart disease, although its use needs to be individualized.