Multigated acquisition (MUGA) scan
A cardiac blood pool scan shows how well the heart is pumping blood out to the rest of the body. It can also evaluate how effectively the main pumping chamber of the heart (the left ventricle) is working by studying the motion of the heart walls
During this test, a small amount of a radioactive substance called a tracer (radionuclide or radioisotope) is injected into a vein. A special camera detects the radioactive material as it flows through the heart and lungs.
This scan uses the electrical signals of the heart to trigger the camera to take a series of pictures that can be viewed later like a motion picture. Testing usually takes up to an hour, depending on which studies are done. You may feel nothing at all during the injection, or you may feel a brief sting or pinch as the needle goes through the skin.