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Definition of Pulmonary embolism

Pulmonary embolism: Sudden closure of a pulmonary artery or one of its branches, caused by a blood-borne clot or foreign material that plugs the vessel.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=13918
Last Editorial Review: 3/19/2012

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