ECG An electrocardiogram (ECG) is a test that records the electrical activity of the heart. An ECG is used to measure:
- Any damage to the heart
- How fast your heart is beating and whether it is beating normally
- The effects of drugs or devices used to control the heart (such as a pacemaker)
- The size and position of your heart chambers
An ECG is a very useful tool for determining whether a person has heart disease