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New studies question vascular multiple sclerosis hypothesis and treatment
Date:8/2/2010

evidence in the Annals by Khan et al. noted that treatment procedures, based upon these findings, have included placing stents in the jugular veins of MS patients which led to serious injury in some cases.

In the current issue of the Annals, Florian Doepp, M.D., and colleagues in Germany performed an extended extra- and trans-cranial color-coded sonography study on 56 MS patients (36 female; 20 male) and 20 control subjects (12 female; 8 male). The analysis included extra-cranial venous blood volume flow (BVF), internal jugular vein (IJV) flow analysis during Valsalva maneuver (VM), as well as tests included in the CCSVI criteria.

Results showed that blood flow direction was normal in all participants, excluding one subject with relapsing-remitting MS. Furthermore, the research team noted that blood volume flow (BVF) in both groups were equal in the supine body position. In summary, the researchers determined that none of the study participants fulfilled more than one criterion for CCSVI.

"Our results call into question the existence of CCSVI in a large proportion of patients with MS," said Dr. Doepp. "We did not find supporting evidence that cerebral venous congestion plays a significant role in the development of MS. Further studies are needed to clarify the difference between MS patients and healthy subjects in blood volume flow regulation," concluded Dr. Doepp.

A second study by researchers at Ume University in Sweden also concluded that CCSVI does not contribute to the development of MS. The Swedish research team led by Peter Sundstrm, M.D., Ph.D., tested the vital component of the CCSVI theorythe obstructed IJV flowin 21 MS patients and 20 healthy controls using magnetic resonance imaging with phase contrast (PC-MRI).

"Using PC-MRI, we were not able to reproduce the findings by Zamboni et al. which suggest CCSVI contributes to the development of MS," said Dr. Sundstrm. The researchers found no significant
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Contact: Dawn Peters
healthnews@wiley.com
781-388-8408
Wiley-Blackwell
Source:Eurekalert

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