Hi...ur dura patch can be the cause of ur issues...and I also have EDS and my surgeon used my pericardium to avoid issues like u r having.
As for The vertebral arteries they are two major arteries that carry oxygen to the brain and spinal cord, so with one blocked this is not good at all and u deff should have this addressed.
Make sure u see a Chiari specialist.
I was scheduled to go through the testing and see surgeon Jan 8th but my employer just gave us new insurance cards. I noticed I have a new provider and now my doctors are no longer covered!
I called University of Chicago and they are going to see me, so I'll have to talk to them and see what they say about testing.
I have EDS/Stickler's syndrome....Geneticist is still unsure about which one as I don't "fit neatly" into either dx. Have you been to a genetic doc? I would strongly suggest that you find out if you, indeed, do have an underlying connective tissue disorder as that could change the protocol for your upcoming surgery.