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Title: People With Migraine More Likely to Develop Venous Thrombosis
URL: http://www.pslgroup.com/dg/22C5E6.htm
Doctor's Guide
September 15, 2008

ST. PAUL, Minn -- September 15, 2008 -- People with migraines may also be more likely to develop blood clots in their veins, according to a study published in the September 16 issue of Neurology.

The study included 574 people from Italy aged 55 to 94 years. Participants were interviewed to determine whether they had a history of migraine or migraine at the time of the evaluation.

Medical records were reviewed for cases of venous thrombosis and the arteries in the patients' necks and thighs were scanned with ultrasounds to check for atherosclerosis.

Of the participants, 111 had migraine and 19% of those with migraine also had 1 or more instances of venous thrombosis compared with only 8% of those without migraine.

Researchers do not know why migraine and venous thrombosis are linked. One theory is that the blood of people with migraine may be more prone to clotting.

The study also found that people with migraine are not more likely to have hardening or narrowing of the arteries, which is contrary to a current theory.

"The thinking has been that because people with migraine are more likely to have strokes and other cardiovascular problems, that they would also have more severe and early atherosclerosis," said coauthor Stefan Kiechl, MD, Innsbruck Medical University, Tyrol, Austria.

"This study is the first to use high-resolution ultrasound to examine this theory, and it provides solid evidence to refute it."

SOURCE: American Academy of Neurology

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