How you prepare

Your doctor should give you instructions about how to prepare for your CT angiogram. You can drive yourself to the appointment, and you'll be able to drive after your test.

Food and medication

Usually, you'll be asked not to eat anything for about four hours before your test. You can drink water, but avoid caffeinated drinks 12 hours before your test, because they can increase your heart rate, which can make it difficult for your doctor to get clear pictures of your heart. If you're allergic to the dye used in the procedure, your doctor might ask you to take steroid medication 12 hours before the procedure to reduce your risk of a reaction.

Clothing and personal items

You'll need to remove clothing above your waist, as well as jewelry and glasses, and change into a hospital gown.

May 26, 2017
References
  1. Cardiac CT. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/ct/. Accessed Feb.1, 2017.
  2. Gerber TC, et al. Noninvasive coronary imaging with cardiac computed tomography and cardiovascular magnetic resonance. http://www.uptodate.com/home. Accessed Feb. 1, 2017.
  3. AskMayoExpert. Coronary CT angiography. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2016.
  4. Coronary angiography. National Heart, Lung, and Blood Institute. https://www.nhlbi.nih.gov/health/health-topics/topics/ca. Accessed Feb. 2, 2017.
  5. Coronary computed tomography angiography (CCTA). RadiologyInfo.org. http://www.radiologyinfo.org/en/info.cfm?pg=angiocoroct. Accessed Feb. 1, 2017.
  6. Douglas PS. Screening for coronary heart disease. http://www.uptodate.com/home. Accessed Feb. 1, 2017.
  7. 2008 Physical Activity Guidelines for Americans. U.S. Department of Health and Human Services. http://www.health.gov/PAGUIDELINES/guidelines/default.aspx. Accessed Feb. 1, 2017.
  8. Eckel RH, et al. 2013 AHA/ACC guideline on lifestyle management to reduce cardiovascular risk. Journal of the American College of Cardiology. 2014;63:2960.