Renee, I'm sorry you found out about this so close to surgery and it may postpone surgery (hopefully it won't) But I'm glad you did find out and discussed it with your daughter's neurologist (I hope she is doing well) and can be checked. Maybe you could call your cardiologist and they can order the MRI, since you are having problems getting your surgeon to return your calls.
Here is a link to the other thread mentioned where this was discussed and it has a couple good links
http://www.valvereplacement.org/for...ship-of-BAV-and-Cerebral-Aneurysms&highlight=
Hopefully things will clear, even tho I believe that 10% of the BAV patients had a cerebral anneuysm, compared to 1% of the general population, that still means 90% of the BAVs tested were fine. (and of the 10% many were smaller aneurysms you just had to watch -they didn't all need intervention.)
As for some of the questions, as far as I know just like any annie, they can start at any time, so If you were having screenings because you are in a higher risk group, they usually reccomend repeating them every 10 years.
I'm not sure what the over all success rate for coiled or clips are, and alot has to do with where the aneurysm is in your brain and how large it is, but usually IF you are able to have your annie coiled (by cath) the success rate is even better than if you need surgery and clips.
But if they are caught early, before symptons, even IF you need intervention the large majority do well with no problems- especially compared to people who have them get large enough to do some brain damage or compared to the terrible odds of surving a brain anuerysm rupture and large bleed.
More than half of the people who have a brain aneurysm rupture die in the hospital (IF they make it to the hospital) and of the people who do survive many have perm brain damage, since the blood has nowhere to go so presses on the brain tissue, before they are able to operate. Also out of the people who DO survive a ruptured brain aneurysm about 1/2 of them will end up with some perm brain damage
Also one of the things that increase the amount of blood hemmoraged so increases the morbitity and mortality of a rupture is anticoagulant, so I could see why it could make sense to have the screening before surgery and you make your final valve choice.
PS I would mention to your surgeon when you meet them how you're concerned that when you try to get ahold of him your phone calls aren't returned..you can even make it seem you are sure he isn't getting them because you KNOW if he was you're sure he would call back..ask how you can make sure he will get the message IF you need him post op.