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Study sheds new light on DVT29 August 2006 Researchers in Holland have revealed new insights into what makes some people more likely to get deep vein thrombosis (DVT). A DVT is a blood clot - usually in the legs - that can form when a person stays in the same position for a long time. It can be fatal if the clot becomes dislodged and moves up to the heart or lungs. DVT is mostly associated with long-haul flights (lasting four hours of more) where movement is restricted. This has earned it the nickname, "economy class syndrome". Researchers at Leiden University recruited 1,906 patients, who had all suffered from blood clots, to take part in the study. They looked at the risk factors that might have made these participants susceptible to developing DVT. The results showed that travelling by car, bus or train for over four hours can increase the risk of DVT to the same extent as travelling by plane. The risk of developing DVT was shown to increase twofold for frequent travellers. People who are very tall, very short, obese, or taking oral contraception are also more likely to get DVT. The researchers say further studies are needed to find out more about DVT risk factors. Most airline companies now provide information on DVT before long-haul flights. Regular movement, elasticated leg supports and avoiding alcohol are thought to help reduce the risk of developing the condition. More information
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