This test combines the treadmill test and the echocardiogram. A resting Echo is done and repeated immediately after the exercise. Both digitized studies are compared side by side. Patients with blocked coronary arteries have transient abnormal motion of part of their heart muscle after exercise, which can be seen with the echocardiogram. If patients cannot exercise, a chemical stress test (as described above) may be substituted for the treadmill exercise.