For an Exercise Treadmill Stress Test (ETT), a technician will gently clean 10 small areas on the patient’s chest and place small, flat, sticky patches, called electrodes, on them. The electrodes are attached to an electrocardiogram (EKG) monitor that charts the heart's electrical activity throughout the test. Before the patient starts to exercise, the technician will take a resting blood pressure and perform an EKG to measure resting heart rate. Then, that patient will begin to exercise by walking on a treadmill. As the test proceeds, the rate of exercise or degree of difficulty will gradually increase, and the patient will be encouraged to exercise until exhaustion.