Description
A stress test is an examination that provides important information about how the heart functions under conditions of physical exertion. It is performed in the cardiology clinic and lasts about 20 minutes. This test can help diagnose or assess the severity of coronary artery disease, the condition responsible for angina and myocardial infarction.
How the test is performed
The stress test involves recording the heart’s electrical activity with an electrocardiogram while the patient exercises. The exercise is performed on a special stationary bicycle. To record the electrocardiogram, electrodes are placed on the chest using special adhesive patches. The patient begins exercising at a moderate pace, which is gradually increased, and the heart’s activity is recorded by the electrodes, while the doctor periodically measures blood pressure.
In the vast majority of patients, the stress test is performed without any problems. However, in a small percentage of patients, particularly those with a significant history of coronary artery disease, arrhythmias may occur—which usually subside when exercise is stopped—or angina symptoms may recur, which is why the test is being performed.