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[edit]Adverse effects
While the procedure has been reported to be generally safe for MS patients,[19][39] severe potential complications related to the angioplasty and stenting include intracranial hemorrhage, stent migration into the heart and jugular vein thrombosis.[13]

Two cases of severe adverse events have been reported in the scientific literature; a death due to a cerebral hemorrhage while on anticoagulant following a stent insertion, and a migration of a stent to the heart's ventricle.[19]

Some United States hospitals have banned the surgical procedure outside clinical trials until more evidence to support its use is available.[6][40]

In 2010 Stanford University halted CCSVI treatments after these two serious incidents. Dr Jeffrey Dunn, associate director of Stanford’s MS center, called on other neurologists to speak out about the potential "dangers" of the unproven procedure: "If I can do anything to protect MS patients from the potentially devastating effects of false hopes or the risks of invasive and unproven treatment, I am happy to do so".[41]

Two Canadians have died after undergoing CCSVI treatment abroad.[42]

On 10 May 2012 the U.S. Food and Drug Administration issued an FDA Safety Communication on CCSVI, stating that MS patients undergoing procedures to treat CCSVI (using angioplasty and/or stenting) risk serious injuries or death. Furthermore, the benefits of these experimental procedures have not been proven. It notes that studies exploring a link between MS and CCSVI are inconclusive.[7]

From http://en.wikipedia.org/wiki/Chronic..._insufficiency