JVIR - Changes of Cine Cerebrospinal Fluid Dynamics in Patients with Multiple Sclerosis Treated with Percutaneous Transluminal Angioplasty: Case-control Study -"...Conclusions: PTA in patients with MS with CCSVI increased CSF flow and decreased CSF velocity, which are indicative of improved venous parenchyma drainage." http://www.jvir.org/article/S1051-0443%2813%2900531-9/abstract