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An echocardiogram is a test that uses ultrasound waves to examine the heart. Because it is a non-invasive test, it is a safe and painless way to help doctors diagnose a number of abnormalities of the heart.n echocardiogram is a test that uses ultrasound waves to examine the heart. Because it is a non-invasive test, it is a safe and painless way to help doctors diagnose a number of abnormalities of the heart.
Echocardiogram. Guide. An echocardiogram (also called an echo) is a type of ultrasound test that uses high-pitched sound waves that are sent through a device called a transducer. The device picks up echoes of the sound waves as they bounce off the different parts of your heart. Check the ability of your heart chambers to pump blood (cardiac performance). 2  During an echocardiogram, your doctor can calculate how much blood your heart is pumping during each heartbeat (ejection fraction). 3  You might have a low ejection fraction if you have heart failure.