Document Detail


Development of the ventriculoarterial segment of the human embryonic heart: a morphometrics study.
MedLine Citation:
PMID:  8379590     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In the literature, discussions continue on the question whether the distal portion of the cardiac outlet segment (ventriculoarterial portion, outflow tract of the embryonic heart) is subject to a shortening (absorption, retraction) during development. In 28 human embryos ranging from 4-42 mm crown-rump length, stereological estimates of volume fractions and surface densities were used to calculate the diameter and the length of the distal outlet segment and their changes during development. A significant increase was found in the wall thickness of this segment, whereas its length remained about the same. An actual shortening was not found. It is concluded that the relative change in proportions is the cause of the disagreements. It is further concluded that there is still a mechanical role for the aorticopulmonary septum in maintaining the length of the outlet segment during growth of this region.
Authors:
E W Thurkow; A C Wenink
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Anatomical record     Volume:  236     ISSN:  0003-276X     ISO Abbreviation:  Anat. Rec.     Publication Date:  1993 Aug 
Date Detail:
Created Date:  1993-10-21     Completed Date:  1993-10-21     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370540     Medline TA:  Anat Rec     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  664-70     Citation Subset:  IM    
Affiliation:
Department of Anatomy and Embryology, University of Leiden, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Cardiac Volume
Fetal Heart / embryology*
Heart Ventricles / embryology
Humans
Truncus Arteriosus / embryology*

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