A stress echocardiogram might be administered during a stress test. It is performed both before and after the doctor applies the stressor, which is often exercise, usually on a treadmill or stationary bike, or medication that makes the heart beat more quickly. The echo measures blood flow along with other features of the heart. A Doppler echocardiogram uses a transducer to detect the movement of blood through the echoes of sound waves. It tests how blood flows through the chambers, valves, and vessels of the heart. The ultrasound also follows the speed and direction of the blood.
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