yes

The MUGA scan is performed to determine if the heart's left and right ventricles are functioning properly and to diagnose abnormalities in the heart wall.

A multiplegated acquisition (MUGA) scan is a variation of this test.

The MUGA scan stands for Multiple Gated Acquisition Scan and is an extremely useful tool to assess the function of the heart. It's also noninvasive. The scan provides a moving image of the beating heart. From this image medical professionals can make conclusions about the health of the cardiac ventricles.

no because the pacemaker is a huge risk to the ct scan and is illegal if done so

Who ever gave this answer is horrible misinformed and is a perfect example as why you should not try to get medical advise on-line unless from a medical site.