pulmonary embolism

Wiktionary

1. n. pathology The embolism or obstruction of a pulmonary artery, usually by a detached blood clot from a leg or pelvic vein, which causes a stoppage of blood into the lungs; symptoms include shortness of breath, chest pain, fainting, and sometimes death.

WordNet 3.0

1. n. blockage of the pulmonary artery by foreign matter or by a blood clot