Learn about Angiography

Angiography is an imaging technique that is used to examine the blood vessels for any problems, such as a blockage or narrowing. A hollow flexible tube called a catheter is inserted into the arteries of the heart. Contrast medium, which is a dye that shows up on x-rays, is then injected through the catheter into the blood vessel being examined. As the dye flows through the blood vessel, a rapid series of x-ray pictures is taken. Here we can see that the dye flows freely through the vessels.


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