Nov. 26, 2007 — Having a DVT (deep vein thrombosis) or a pulmonary embolism may make a heart attack or stroke more likely, especially in the first year after having a DVT.

Danish researchers report that news in The Lancet.

A DVT is a blood clot that forms in a vein deep in the body. A pulmonary embolism is a sudden blockage in a lung artery, usually due to a blood clot that travels from a deep leg vein to the lungs.

Click here to see all the active links: http://www.webmd.com/dvt/news/20071126/dvt-tied-to-heart-attack-stroke-risk

For sure, hydration is key. Another reason to get up and about during long flights is to grab a water and to use the facilities.