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Definition of Pulmonary embolus

Pulmonary embolus: A blood clot that has passed into and occluded the lung's pulmonary artery. An embolus causes an embolism. In this case, the embolus, a clot or foreign material, has been carried through the blood into the pulmonary artery or one of its branches, plugging the vessel.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=11911
Last Editorial Review: 11/30/1999 8:49:00 PM

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