PMID: 3740454Jan 1, 1986

The local expression of adult chicken heart myosins during development. II. Ventricular conducting tissue

Anatomy and Embryology
E SandersAntoon F M Moorman

Abstract

The development of the ventricular conducting tissue of the embryonic chicken heart has been studied using a previous finding that morphologically recognizable atrial conducting tissue coexpresses the atrial and the ventricular myosin isoforms. It is found that, by these criteria, at 9 days part of the ventricular conduction system consists of a myocardial ring located around the infundibula of the aorta and truncus pulmonalis. Part of this ring is formed by the retro-aortic root branch. The ring continues via the septal branch into the atrioventricular bundle and its branches, that all express both myosin isoforms. The retro-aortic root branch could be traced back as a part of the myocardial wall of the truncus arteriosus at the 4 days embryonic stage. At the 16th day of development, the septal branch, atrioventricular bundle and left and right bundle branches no longer express the atrial isomyosin, but two bundles originating from the septal branch still express both isomyosins, one being the retro-aortic root branch, the other being only immunologically recognizable and directed to the ventral side of the truncus pulmonalis; this latter we call the pulmonary root branch. Both bundles are remnants of the myocardial ring.

References

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Jan 1, 1991·Journal of Perinatal Medicine·Antoon F M MoormanW H Lamers
Oct 21, 2020·Journal of Cardiovascular Development and Disease·Bjarke JensenAntoon F M Moorman

Citations

Dec 14, 1979·Biochimica Et Biophysica Acta·L D LiberaS Schiaffino
Jan 1, 1985·Anatomy and Embryology·I J de GrootAntoon F M Moorman
Jan 1, 1985·International Journal of Cardiology·H Kurosawa, A E Becker
Jan 1, 1971·Zeitschrift Für Anatomie Und Entwicklungsgeschichte·R O'Rahilly, E Gardner
Dec 1, 1982·The Journal of Cell Biology·L GorzaS Schiaffino
Mar 1, 1980·Anatomia, histologia, embryologia·Y Kim, M Yasuda
Jan 1, 1981·The Journal of Cell Biology·S SartoreS Schiaffino

Related Concepts

Embryo
Left Ventricular Structure
Truncus Arteriosus
Truncus Arteriosus, Persistent
Myocardium
Truncus Arteriosus Gene
Embryonic and Fetal Development
Right Atrial Structure
Atrial Fibrillation
Pulmonary Artery Structure

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