You will generally feel some discomfort at the site where the IV is placed. Most blood vessels do not have nerve endings, so you probably won't feel the catheter inside of your body.
Depending upon the type of arteriogram being performed, you may experience a variety of symptoms when the doctor injects the contrast material. For example, with a arteriogram of the head (cerebral arteriogram), you may feel a brief flushing feeling in your head.
If the IV is placed in your groin, you will usually be asked to lie flat on your back for a few hours after the test to avoid bleeding. This may cause some mild back discomfort.
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