CCSVI often involves the dural and transverse sinus, and this many not be improved with simple jugular angioplasty. (Thanks to Yam Andy for sharing his MRV in the post section today, check it out.) We need more research. Here's a brand new paper on this topic:
"Moreover, Zamboni et al.recently proposed a new hypothesis for pathomechanisms of multiple sclerosis (MS): chronic cerebrospinal venous insufficiency (CCSVI). Research reports to verify this hypothesis have also increased The IJV and dural sinus are considerably associated with CCSVI. Although this study does not reveal the details of this relationship, we should conduct an investigation based on this hypothesis in future studies." http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3654179/