An echocardiogram (echo) is a graphic representation of the heart’s movement. During an echo test, ultrasound (high-frequency sound waves) from a hand-held wand is placed on the chest which provides pictures of the heart’s valves and chambers and helps the sonographer evaluate the pumping action of the heart.
Echo is usually done with Doppler ultrasound and color Doppler to evaluate blood flow across the heart’s valves.