my husband had stagnent flow in his smaller lijv. The vein never closed, no thrombosis or stenosis, it just didn't have as strong flow as the right side and collapsed when supine. It was determined that he had dural venous stenosis, right up above the left jugular, which was impeding flow down that side. It's taken three procedures to address his malformation.
I would suggest staying hydrated, as hypovolemia (or low blood volume due to slight dehydration and lack of movement) can be a problem for many with MS. Blood thinners and fibrin reducing supplements can also help. The Endothelial Health program, based on Dr. John Cooke's The Cardiovascular Cure, can help, as well.
http://www.ccsvi.org/index.php/helping- ... ial-health
My husband finally has good flow on both sides. He has lost weight, is very physically active, on the Swank Diet and hydrates well. We hope these measures keep both sides open and flowing....and hope this helps you---