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Anatomic classification of the right aortic arch.

Sudesh Prabhu1, Siddhant Mehra1, Srikanth Kasturi1

  • 1Department of Paediatric Cardiac Surgery, Narayana Institute of Cardiac Sciences, Bengaluru, India.

Cardiology in the Young
|October 28, 2020
PubMed
Summary

A right aortic arch arches over the right bronchus. This study classifies right aortic arch anatomy into 10 variants using radiological evidence and embryological references.

Keywords:
Edwards’s double aortic arch conceptRathke’s aortic arch diagramRight aortic archcourse of laryngeal nerveembryology of aortic arch

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Area of Science:

  • Anatomy
  • Embryology
  • Radiology

Background:

  • The right aortic arch is an anatomical variation where the aorta arches over the right bronchus.
  • Previous classifications by Felson et al. and Shuford et al. described two and three types, respectively.
  • Other variants like isolated and aberrant left brachiocephalic arteries have also been noted.

Purpose of the Study:

  • To propose a comprehensive classification of right aortic arch anatomy.
  • To support this classification with radiological evidence.
  • To correlate the anatomical variants with potential embryological origins.

Main Methods:

  • Review and analysis of radiological evidence of right aortic arch cases.
  • Comparison with existing classifications and embryological theories.
  • Development of a novel classification system for right aortic arch variants.

Main Results:

  • A new classification system categorizing right aortic arch anatomy into 10 distinct variants.
  • Radiological evidence supporting each of the 10 identified variants.
  • Proposed embryological explanations for the formation of these variants.

Conclusions:

  • The proposed 10-variant classification provides a detailed morphological understanding of right aortic arch.
  • This classification aids in comprehending the development of various right aortic arch types.
  • Understanding these variants is crucial for predicting the course of the recurrent laryngeal nerve.