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Echocardiogram, often referred to as a cardiac echo or simply an echo, is a sonogram of the heart. (It is not abbreviated as ECG, an abbreviation for an electrocardiogram .) Echocardiography uses standard two-dimensional, three-dimensional, and Doppler ultrasound to create images 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.