MUGA Testing

The medical term for the MUGA test is Electrocardiographic Multi-Gated Acquisition Study with First Pass Radionuclide Angiography (MUGA).


The purpose of this test to check on how your heart's ventricles are working. It does this by looking at the muscle motion of the heart muscle while it is beating. The ventricles are the large muscular chambers in the lower part of your heart that pump blood to your lungs (right ventricle) and to the rest of your body (left ventricle). The test also checks the ejection fraction of the heart. This is the amount of blood that is being pushed out by the heart.

The purpose of a MUGA study is to evaluate right and left ventricular wall motion and ejection fraction. There is no preparation for this test.


Normal myocardial ejection fraction and coronary perfusion.


