Coronary angiography is a test that uses a contrast agent and x-rays to show the insides of your coronary arteries and is an invasive test. A thin, flexible tube called a catheter is inserted into a blood vessel in your arm, groin (upper thigh) or neck. The tube is threaded into your coronary arteries and the dye is released into your bloodstream. X-ray pictures are taken while the dye is flowing through the coronary arteries.
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