During this test, an echocardiogram (ultrasound of the heart) is done both before and after your heart is stressed by having you exercise to make your heart beat harder and faster.  A stress echocardiogram is usually done to find out if you might have decreased blood flow to your heart.

WebMD. (2007, December 24). Retrieved from http://www.webmd.com/heart-disease/echocardiogram