Exercise Treadmill ECG

Also known as an exercise electrocardiogram, exercise electrocardiography or exercise stress testing.
An exercise ECG is an electrocardiogram that is recorded while you are exercising on a treadmill (a running machine) or on an exercise bike. If you get a chest pain or feel uncomfortable when you are physically active, this test can help to tell if your symptoms are caused by coronary heart disease. If you have recently had heart surgery, an exercise ECG can help doctors decide what level of exercise you should do as part of your cardiac rehabilitation programme.

Your exercise performance can be assessed during the test.

Getting ready for the test

Wear light, comfortable clothes and shoes. Avoid a heavy meal before your test.

What happens?

Several small patches, set in sticky plaster, are put on your chest and connected to an ECG recorder, in the same way as for the ECG described earlier. You will then be asked to exercise on a treadmill.

The test starts off at a very easy rate and is gradually made harder either by increasing the speed and slope of the treadmill. A doctor will supervise the test and will carefully check your ECG readings, blood pressure and breathing.

The medical staff will tell you when to stop - usually when they have the measurements they need. They will also tell you to stop if you get tired or very short of breath, or if you start getting unpleasant chest pains. Let them know if you get any of these symptoms. You can also tell the staff if you cannot carry on with the test. They will then take more ECG readings after you have stopped exercising.

The exercise test usually lasts about 15 minutes. It can be hard work, but should not be too much for you. Many people are pleasantly surprised by how much they can achieve. The value of the test is much greater if you try to work as hard as you can.

What can the test show?

The exercise ECG shows doctors the pattern of your heart activity during exercise. The doctors also need to know how much exercise you can do.

After the test, you may be told that you have had a 'positive' or a 'negative' exercise ECG.
· A positive exercise ECG is when significant changes are seen on the ECG during exercise. This means that you probably have coronary heart disease.

· A negative exercise ECG means there are no unusual or obvious changes shown on the ECG during the test.

The exercise ECG is a very useful test, but it is still not 100% accurate. Sometimes people with a normal heart have an exercise ECG that shows abnormalities. (For some unknown reason this often happens with young women). And sometimes a person who does have coronary heart disease may have a normal exercise ECG.