Hi spmcc and welcome to our group,
I hadn't heard of CCSVI so googled on it and read that the initials stand for chronic cerebro-spinal venous insufficiency, which is so far regarded as an unproven hypothesis and is viewed with scepticism by most doctors. I didn't notice anything suggesting that it might be related to rosacea. However, if CCSVI does turn out to be true, and if it is related to multiple sclerosis and if it does lead on to a cure, that would be just brilliant for those poor souls.
Would you would like to update this thread if you learn of anything on the subject that does link it with rosacea, please?