Document Detail

Migration and torsions of the conotruncus in the chick embryo heart: observational evidence and conclusions drawn from experimental intervention.
MedLine Citation:
PMID:  3831028     Owner:  NLM     Status:  MEDLINE    
It seems difficult to escape the conclusion that conotruncal migration and torsions do occur: The amplitude, direction and timing of these movements can be accurately tracked and they can be experimentally arrested. The movements have a significant function: Associated with the partitionings, they regulate the outlet ventricular distribution at two levels, permitting an adjustment between the ampullae and conus (a function of migration) and between the proximal and distal conal segments (via torsions). Their defects result in malalignments--double outlet right ventricle and transposition of the great vessels, respectively. The mechanism of the migration is linked to the differential growth of ampullae; the right ampulla and certain areas of this ampulla appear as dominant during the embryonic period. The conus is carried by the right ampulla and passively undergoes migration. The mechanism of the torsions is not entirely clear. The proximal torsion appears to be linked to a myocardium--jelly dissociation; the distal torsion seems to be linked to an oriented myocardial growth of its wall; the torsion of the truncus is evidently passive, occurring as a consequence of the conus distal torsion.
X Dor; P Corone
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Heart and vessels     Volume:  1     ISSN:  0910-8327     ISO Abbreviation:  Heart Vessels     Publication Date:  1985 Nov 
Date Detail:
Created Date:  1986-05-02     Completed Date:  1986-05-02     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8511258     Medline TA:  Heart Vessels     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  195-211     Citation Subset:  IM    
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MeSH Terms
Aorta / abnormalities
Chick Embryo
Endocardial Cushion Defects / embryology
Heart Defects, Congenital / embryology*
Heart Septum / embryology
Heart Ventricles / abnormalities,  embryology
Myocardium / ultrastructure
Pulmonary Artery / abnormalities
Torsion Abnormality
Transposition of Great Vessels / embryology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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