Electrocardiogram (ECG)
The ECG is a recording of the electrical activity of the heart. Patches (electrodes) are placed on the chest, arms and legs to detect the information.
The test is used to:
- Assess your heart rate and rhythm
- Diagnose poor blood flow to the heart muscle (ischemia)
- Diagnose a heart attack
- Diagnose abnormalities of your heart such as heart enlargement or abnormal electrical conduction
Preparing for the test
- Avoid skin creams and lotions the day of the test. They prevent the patches from sticking to the skin.
- Avoid full-length hosiery, as the patches need to be placed directly on the legs.
- Wear a shirt that can be easily, as the patches need to be placed directly on the chest and arms.
What to expect during the test
A technician will attach 10 sticky patches (electrodes) to the skin of your chest, arms and legs. Men may need to have chest hair shaved to allow a better connection. You will lie flat while the computer creates a picture of the electrical activity produced by your heart.
It takes about 10 minutes to attach the patches and complete the test, but the actual recording takes only a few seconds.
Your ECG will be kept on file for comparison with future ECG recordings.
What to expect after the test
This test is typically performed during your scheduled office exam. The doctor will discuss the results of the ECG with you during your visit.