Hi,
There is risks with any invasive procedures, anytime you invade the body with foreign things, catheters, dyes, things like that, especially with things going to the brain, is a tricky, delicate procedure. If you have a good doc you trust and confidence in the facility, like I do I don't worry too much about the risks. These procedures are done alot and should be well perfected. They have to tell you the risks, its a legal thing for when you sign your consent. The decision is ultimately yours. If it is going to cause you to stress out then request to have the CT angeogram which is much less invasive, but not as accurate as the traditional angeogram, Good luck in what ever you decide to do,
Ruthie