pulmonary embolism

noun

: obstruction of a pulmonary artery or one of its branches that is usually produced by a blood clot which has originated in a vein of the leg or pelvis and traveled to the lungs and that is marked by labored breathing, chest pain, fainting, rapid heart rate, cyanosis, shock, and sometimes death

… whether physical activity during flight is protective against pulmonary embolism remains to be demonstrated.

—Frederic Lapostolle et al., The Journal of the American Medical Association

—abbreviation PE