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patent ductus arteriosus

[ pātnt; är-tîr′ē-ōsəs ]
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n.
A congenital cardiac defect caused by failure of the ductus arteriosus to close at birth.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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