pulmonary stenosis

Medical Dictionary

pulmonary stenosis n.
Narrowing of the opening into the pulmonary artery from the right ventricle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

pulmonary stenosis

narrowing of either the pulmonary valve-the valve through which blood flows from the right ventricle, or lower chamber, of the heart on its way to the lungs-or the infundibulum, or of both. The infundibulum (Latin: "funnel") is the funnel-shaped portion of the right ventricle that opens into the pulmonary artery. Its narrowing is also called infundibular stenosis. Pulmonary stenosis is usually a congenital defect and may be associated with other cardiovascular congenital defects.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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