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It has been found that many people with MS have blocked internal jugular veins. Many also have a blocked azygos (chest) vein. The blockage of these critical veins prevents adequate drainage of blood from the brain and spine.


This venous disorder is called Chronic Cerebrospinal Venous Insufficiency (CCSVI). A growing number of vascular specialists believe that CCSVI contributes to the symptoms of MS. Others believe it causes MS.


There is a long history of science which indicates that vascular abnormalities are associated with MS.


Other neurological conditions, such as Parkinson’s Disease, may also be associated with CCSVI.