ECG Stress Testing
An electrocardiogram (ECG) stress test monitors a person’s heartbeat at rest and during exercise, most commonly while a person walks on a treadmill. A physician observes the person, monitors the exercise level, and makes recordings until the person’s heart nears a maximum predicted heart rate. The heart also is monitored during the period of cool-down or recovery that immediately follows exercise. The recordings made before, during, and immediately after an ECG stress test can show subtle changes in the heart’s electrical activity.