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atrial septal defect

atrial septal defect in Medicine

atrial septal defect n.
A defect in the interatrial septum of the heart, due to failure of the embryonic foramen to close normally.

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