patent ductus arteriosus

[pātnt; är-tîr′ē-ōsəs]

n.

A congenital cardiac defect caused by failure of the ductus arteriosus to close at birth.

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