The Exercise Tolerance Test (ETT), also known as a cardiac stress test, is a diagnostic procedure used to evaluate how well your heart performs during physical activity. During the test, your heart’s electrical activity, heart rate, and blood pressure are continuously monitored while you walk on a treadmill or pedal a stationary bicycle.

This test helps specialists identify underlying coronary artery disease, irregular heart rhythms, and exercise-induced cardiac abnormalities that may not be visible while the body is at rest. It also assists in assessing physical fitness levels, monitoring treatment effectiveness, and determining safe exercise capacity for patients with heart conditions.