What is it?
A MUGA scan is a test using a radioisotope that shows how blood pools in your heart during rest. The test can tell doctors how well the heart is pumping blood. This test allows your doctor to calculate your “ejection fraction,” which is the percentage of blood that is pumped out of your heart’s lower chamber (called the left ventricle) with each heartbeat. This test is also called a Gated Blood Pool scan.