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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

ROJAS OVIEDO, José Dario  and  BALLESTEROS ACUNA, Luis Ernesto. Branches Arise of the Aortic Arch in Human Fetus: A Descriptive Direct Study in Colombian Population. Int. J. Morphol. [online]. 2009, vol.27, n.4, pp.989-996. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022009000400005.

The anatomic variations in position and number of branches arise of the aortic arch have different grades of clinical implication and the right treatment and prognosis of associated anomalies depend of their early diagnosis. Reviewing your morphogenesis complex and previous literature come up the hypothesis about some expression could be transitional during gestation and do not to express in postnatal life. The morphological expression of the branches of the aortic arch in human fetuses is unknown in Colombia and that is why this study has been developed. 51 cardiopulmonary blocks obtained from stillborn fetus from 17th to 40th gestation weeks without cardiovascular anomalies, were analyzed and filled with polyester resin. Then the number of branches arises from the aortic arch and the distance between them was also analyzed through gestation. In 56.9% of the cases 3 branches are arisen from the aortic arch, 2 branches in 27.5% and 4 branches in 15.7%. The number of branches according to gestational age showed no significant difference (p>0.1). Distance between the first and the last branches increases linearly with gestational age, but showed no significant difference (p>0.1) between the number of branches and the gestation's weeks of the analyzed fetus. The variations found in the number of branches from the aortic arch are further than what literature reports, especially in cases with 4 branches, in these cases the additional branch was between left common carotid and left subclavian artery. These findings indicate than the morphologic patterns were defined since the embryonic stage, and they do not change during gestation.

Keywords : Aortic arch; Human fetus; Anatomic variations; Colombia.

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