BNAC has conducted the largest scale doppler US testing of CCSVI, and found CCSVI prevalence is significantly higher in MS. Now they go back and look at how CCSVI impacts MS disease--and they have found that the severity of CCSVI is related to brainstem function and progressive disease state, but not physical disability. Venous hemodynamics (VH) are a new variable that can be linked to MS. Here is the full pdf http://www.biomedcentral.com/content/pdf/1471-2377-12-26.pdf


Clinical correlates of chronic cerebrospinal venous insufficiency in multiple sclerosis
www.biomedcentral.com
Chronic cerebrospinal venous insufficiency (CCSVI) is a vascular condition characterized by anomalies of the primary veins outside the skull that has been reported to be associated with MS. In the blinded Combined Transcranial (TCD) and Extracranial Venous Doppler Evaluation (CTEVD) study, we found ...