Dobutamine stress test, also known as dobutamine stress echocardiography, is a non-invasive diagnostic procedure that uses a combination of dobutamine infusion and echocardiography to evaluate the heart's function and blood flow under stress. Dobutamine, a medication that mimics the effects of exercise, is administered to increase the heart rate and contractility, while echocardiography captures real-time images of the heart's chambers and valves to assess their performance.