what does that mean if you need to get one done?

CAT (computerized axial tomography) is now called CT (computerized tomography) scan. CT scan is used only occasionally for evaluation of the heart. It  is useful for evaluation of pericardial thickening and pulmonary embolism. For other purposes, echocardiography is more commonly used. Cardiac MRI (magnetic resonance imaging) is also a promising modality.

It means that the cardiologist wants to examine the structure of the heart.



Various reasons: to see if there is an abnormal size, something wrong with the blood vessels near the heart, ... lots of reasons.



If it's you, just ask!