Hello. Having A Wrist Angiogram Next Week What I've Been

Hello. Having a wrist angiogram next week what I've been told is I could sit in the chair and the procedure would take only 20 minutes. It all sounds too good to be true. What are some minor complications a person good experience. I understand the major risk levels are extremely low for stroke or clots- in the 2% category. Is there any site you could refer my family to to see the procedure? Thank you