Some procedures for diagnosis and treatment of cardiovascular disease use contrast dye. Angiograms are one example. These diagnostic tests rely on a special type of X-ray dye to help your physician gather images of your blood vessels and identify any life-threatening blockages.
It is possible to be allergic to the contrast dye. If you have a known allergy to shellfish, iodine or X-ray dye, you should let your physician know. The contrast dye typically used during the angiogram procedure contains iodine. Some patients may have a minor reaction to the X-ray dye, such as a skin rash or itching. The chance of a life-threatening reaction to the dye is very small.
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