I have had CCSVI and I able to type this thanks to the procedure.  Studies have shown excess iron in our brains because of poor blood flow.  The veins draining the brain have various difficulties functioning.  The theory is that the untreated blood causes problems relating to Multiple Sclerosis.  CCSVI improves blood flow through a tested procedure called venoplasty.

Where do the swamps come in?

I have lived all of my life in Southeastern Louisiana.  As a population, we know we are living on recovered swampland.  Our houses settle or sink.  Streets are disasters with potholes and other problems.  The reasons stem from a reality of filling in swamp and make it live able by humans.  Close to the Mississippi River, the land is higher and flooding can be less frequent. 

To remaining swamplands have been damaged because saltwater intrusion has harmed the swamp.  Once flourishing swamps, full of animals, great for fishing and hunting, are seeing damage by nature.  The problems come from the hurricanes used to lose strength over these swamps and now the area has very little to lower the powers of a storm.

CCSVI plays into this thought because it restores proper flow and allows blood to travel out and be processed by other organs of the body.  The stale blood remains in the brain, unfiltered and causes problems.

The theory lives in concept of taking nature into our bodies and showing a possible relationship. 

I hope this idea potentially explains the very complicated results from CCSVI.