I was surprised that there wasn't blockage in the azygous, but the cd of images I have cofirm what the Dr. said. With my symptoms and diagnosis I was confident that they would find azygous problems. I've been wrong before, just add this to the list.
It's possible that the MS diagnosis that each us have as a label are incorrect. Not afraid of being wrong again, I believe that CCSVI (still in its infancy) will redefine the types of MS.
I was just treated, and I too had very significant blockage in the left (75%) some in the right jugular (50%) and aleggedly none in the azygous vein, which is not what I was expecting. I too have PPMS, but very very slow. (35 years and I still don't use a cane very often. My problems are neuropathic pain, balance, total morning weakness and balance). I wonder if I had very mild, almost unnoticable Relapses, perhaps very often, and that gets labled as PPMS?
I did not expect any symptom improvement, just joped for ceassation of progression, but I noted surprising immediate improvements. I had not been able to stand on one leg and lift the other into my pants leg for 10 years. Getting my pants on in the a.m. was quite a procedure, usually sitting down. The first day I stood on one leg and lifted the other all the way knee high and slid it smoothly into my pants leg! then repeated, the other side. As I said it had been over 10 years.
However, the effects have faded somewhat, especially the a.m. improvement and I suspect very rapid, (a few dalys) restenosis.
The mental effects (including optical processing... I could drive much more comfortably in busy traffic for example, or scan grocercy store shelves for a product, which I could not do at all pre treatment) were also notable, but they had never been quantified so I can't "prove" anything. However, they too have faded somewhat although not completely, again I suspect restenosis.
Your experience sounds so much like mine that I will be interested in hearing how things go. Especially with your local IR and his reevaluation over time.