CCSVI?

Am just wondering if anyone has explored or even gone down the CCSVI route. I heard (second hand) recently of some people who had the treatment ( vascular balloon implants?) and it had made an almost immediate improvement to the tingling and cold/hot symptoms in hands and feet .

Itrs all new but I can see some logic to the idea that freeing up the blood flow- reducing the pressure at key points will reduce the potential for blood to reach the nervous system -brain and spinal cord.