Normally, one should be glad learning that everything is OK after an examination, but in our case, this kind of result is quite disappointing.
I am really sorry for you, Jojob!
But don't loose hope!
Perhaps the absence of flow in the left vertebral vein is for something in your MS symptoms, even if can be detected on healthy people too.
After all, there are also people with stenoses who don't have MS.
Best wishes to you