My boyfriend just got an Cerebral Angiogram yesterday- is it normal to have pain just above the knee?

If I were you, I would just call the hospital and explain this to a nurse to see if they think that he needs to be seen. Given his history I would not leave anything to chance. It could be that when he had the procedure it could have dislodged another clot that had formed. He should always have things that are out of the norm checked because he has a history of vessel issues. Good luck. By the way, is he on any blood thinners? Usually persons with these kinds of problems are recommended to take a blood thinner or at least a baby aspirin daily. I would ask the doctor just to see what he/she says.