Computed Tomography Angiogram (CT Angiogram)
What Affects the Test
You may not be able to have a CT angiogram if:
- You are pregnant. A CT angiogram isn't usually done when a woman is pregnant, because there is a chance that the baby might be harmed by the radiation.
- You have had an X-ray test that used barium Reference contrast material Opens New Window (such as a Reference barium enema Opens New Window) or have taken a medicine that contains bismuth (such as Pepto-Bismol) in the past 4 days. These substances show up on a CT angiogram and make it hard to see the picture clearly. A CT angiogram should be done before any tests that use these substances.
- You are allergic to the dye (contrast material) that is used during the test.
- You have kidney problems. The dye used during the test can cause kidney damage in people whose kidneys don't work well.
- You take metformin (such as Glucophage) to control your Reference diabetes Opens New Window. The dye used during the test may cause problems if you take this medicine.
- You are obese. A person who is very overweight may not fit into a standard CT machine, or the X-ray table may not be able to support his or her weight.
- You can't lie still during the test.
- You have metal objects in your body, such as surgical clips or metal in joint replacements. These objects may prevent a clear view of the areas being examined.
|By:||Reference Healthwise Staff||Last Revised: Reference June 13, 2012|
|Medical Review:||Reference Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology
Reference George Philippides, MD - Cardiology