Acta Chir Scand. Letter Landgraf, H ECS, fluid balance and lower leg edema ASEM Oct '94 Simulated 12 hour flight significant but not pathological swelling, exercise didn't help, not likely to cause DVT but people with risk factors should take precautions. Studied 1527 case records. Study links 25 deaths to ECS 150 treated each year at Tokyo airport, 50-60 serious. None in group wearing compression stockings.
PE is relatively common at autopsy, usually unexpected, and frequently the cause of death.