Is a catheter venogram required before styloidectomy and C1 shave?

Hi all,

I have very apparent IJ compression between by styloid process and C1 (right > left).
My surgeon was comfortable proceeding without an invasive catheter angiogram/venogram, but I am not sure if I should absolutely proceed with the catheter venogram before surgery. I am scheduled with a consult with Patsalides next week to discuss.

How did you decide on proceeding with the catheter venogram if not required by your surgeon?

Thanks!