Your doctor will tell you how to prepare for the cardiac CT scan. He or she may tell you to avoid caffeine and not eat anything for 4 hours before the scan. You’re usually allowed to drink water before the test.
If you take medicine for diabetes, talk with your doctor about whether you'll need to change how you take it on the day of your cardiac CT scan.
Tell your doctor whether you:
A technician will ask you to remove your clothes above the waist and wear a hospital gown. You also will be asked to remove any jewelry from around your neck or chest.
If you don't have asthma, COPD (chronic obstructive pulmonary disease), or heart failure, your doctor may give you medicine to slow your heart rate. A slower heart rate will help produce better quality pictures. The medicine will be given by mouth or injected into a vein.
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