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An echocardiogram (often called "echo") is a graphic outline of the heart's movement. During an echocardiogram test, ultrasound that comes from a hand-held wand placed on your chest, is used to provide pictures of the heart's valves and chambers and help the sonographer evaluate the pumping action of the heart. An echo test is often combined with a doppler ultrasound and color doppler to evaluate blood flow across the heart's valves.