Wall Motion Tests
This test generates a moving picture of your beating heart and allows your doctor to see how well your heart is pumping. As with other diagnostic tests, you will be connected to an electrocardiograph monitor so that your heart can be watched throughout the procedure.
A small needle will be put into your vein. You will then receive two injections.
The first sticks to your red blood cells for a short time. The second, given about 20 minutes later, is a radioactive substance. Without the first injection, the radioactive substance would not attach to the red blood cells, and it would not be possible to track the flow of blood through your heart's chambers.
After the second injection, you will lie on a special table under a camera for about 15 minutes, during which time images of your heart are obtained. Doctors will use these images to measure the pumping function of the heart (ejection fraction—the fraction of blood pumped out of the heart during each beat).
Depending on the type of wall motion study, additional briefer images in different positions may also be obtained.