How does an echocardiogram function?

Doppler effect. The echocardiogram utilizes ultrasound and a principle called the doppler effect. Doppler effect means sound waves are reflected at different velocities and this information is electronically transformed to allow visualization of structural details and provide information about blood flow velocities.
Ultrasound. An echocardiorgam is a test used to visualize the heart pump functoin and valves in a non-invasive fashion. Gel is placed on your chest allowing contact of a visualization probe that delivers ultrasound to your heart that "bounces back" like radar to the probe and to a large computer that can make a 2-d picture of your heart and its blood flow through the valves.