Ask The Doctors: 06/07
Contrast dye is injected into the blood vessels to give cardiologists a better view of your arteries during a heart catheterization.can we be more specific about what kind of substance it is? Similar agents are used during some computed tomography (CT) scans or other medical procedures. If you have such a procedure scheduled, you should definitely inform your cardiologist that you’ve had a problem with contrast dye in the past. If possible, also try to relate how long ago it occurred and what your specific reaction was.