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IJAR.2016.520

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Type of Article:  Original Research

Volume 5; Issue 1 (February 2017)

Page No.: 3516-3520

DOI: https://dx.doi.org/10.16965/ijar.2016.520

A STUDY ON BRANCHING PATTERN OF ARCH OF AORTA WITH ITS EMBRYOLOGICAL SIGNIFICANCE AND REVIEW OF LITERATURE

Shakuntala Rao *1, K Meera 2, K. Sujatha 3, H.R. Krishna Rao 4.

*1 Professor, Department of Anatomy, P.E.S. Institute of Medical Sciences and Research, Kuppam, Andhra Pradesh, India.

2 Assistant Professor, Department of Anatomy, P.E.S. Institute of Medical Sciences and Research, Kuppam, Andhra Pradesh, India.

3 Assistant Professor, Department of Anatomy, P.E.S. Institute of Medical Sciences and Research, Kuppam, Andhra Pradesh, India.

4 Professor and Head, P.E.S. Institute of Medical Sciences and Research, Kuppam, Andhra Pradesh, India.

Address for Correspondence: Dr. N. Shakuntala Rao, Professor, P.E.S. Institute of Medical Sciences and Research, Kuppam, Andhra Pradesh 517425, India. E-Mail: drshakuntala@gmail.com 

ABSTRACT

Introduction: The Arch of Aorta normally provides three major branches from its convex surface, before descending down as the thoracic aorta. The branches arranged from right to left are the brachiocephalic trunk, the left common carotid artery and the left subclavian artery. The right common carotid artery and the right subclavian artery are given off by the brachiocephalic trunk. Any variation in the origin and arrangement of these branches are considered to be deviations from the normal process of development of the aortic arches.

Objective: To observe the variation in the branches arising from the aorta and to correlate with embryological development and discuss clinical significance.

Materials and Methods: The study involved 36 formalin fixed cadavers, 12 female and 24 male cadavers, which were used for routine dissection and teaching purposes for the first year medical students in the department of Anatomy, P.E.S Institute of Medical Sciences and Research.

Results: The arch of aorta was normal in 33 of the 36 cadavers. There were three cadavers which showed variation in the origin of branches from the arch of aorta. The variations were different in each of the cadavers and the same were discussed in detail while comparing with available literature.

Conclusion: The variation in the arch of aorta is due to involution of some parts of the arterial arches during development. In this study the origin of right subclavian artery from the distal part of arch of aorta and passing posterior to esophagus is a significant variation to be noted. We also observed that In the present study it was not present close to the left subclavian artery but deviated to the right behind the esophagus from the distal part of the arch and did not form a ring. This can have clinically significant symptoms and signs related to pathology in the esophagus or during deglutition.

KEY WORDS: Common Carotid Trunk, Aberrant Right Subclavian Artery, Variant Arch Of Aorta.

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Cite this article: N. Shakuntala Rao, K Meera, K. Sujatha, H.R. Krishna Rao. A STUDY ON BRANCHING PATTERN OF ARCH OF AORTA WITH ITS EMBRYOLOGICAL SIGNIFICANCE AND REVIEW OF LITERATURE. Int J Anat Res 2017;5(1):3516-3520. DOI: 10.16965/ijar.2016.520