Wonderfulworld, a totally immobile valve is exactly what is meant when a CCSVI blockage is discussed. My left jugular had a totally immobile valve that caused a 100% blockage.
That sounds like one of the zamboni criteria, ythe one where the jugular vein is bigger when upright than when lying down (opposite of how it should be). It's an indication of a blood flow problem...it might be big because it is pooled or because it is taking flow that would have gone down the other jugular? Not sure. But the Zamboni criteria are still being adjusted (they dropped the deep cerebral veins criteria) and are not one-to-one matches with what is found when the procedure is done. Best bet is a venogram with ivus by an expert.
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