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Anatomical relationship between mitral valve annulus and circumflex artery and its surgical implications

C S Torres1, J V S Sanders1, H Martins de Brito1

  • 1Department of Morphology, Faculty of Medicine, Federal University of Ceará, Street Delmiro de Farias s/n, Rodolfo-Teófilo Zip code: 60.430-170, Ceará, Fortaleza, Brazil.

Morphologie : Bulletin De L'Association Des Anatomistes
|April 21, 2020
PubMed

Insights

Mitral valve surgery risks circumflex artery (Cx) damage due to proximity. Study shows Cx diameter varies by heart type, aiding surgical planning to reduce iatrogenic lesions.

Area of Science:

  • Cardiovascular Anatomy
  • Surgical Anatomy
  • Cardiac Surgery

Background:

  • Iatrogenic lesions on the circumflex artery (Cx) can occur during mitral valve (MV) annulus surgery.
  • The close proximity of the Cx to the MV annulus increases the risk of surgical injury.

Purpose of the Study:

  • To assess the relationship between the mitral valve annulus and the circumflex artery at various points.
  • To identify and highlight the risks associated with potential damage to the circumflex artery during cardiac procedures.

Main Methods:

  • Fifty adult human cadaveric hearts were analyzed.
  • Hearts were classified by coronary dominance and Cx type (Type 1 or Type 2).
  • Measurements of Cx diameter and MV annulus diameter were taken at three specific reference points (A, B, C).

Main Results:

  • Type 1 Cx (86% of hearts) showed a significantly larger diameter at spot A compared to spots B and C (P=0.001).
  • Type 2 Cx (14% of hearts) did not exhibit significant differences in diameter across the three spots.
  • No significant differences in fibrous annulus thickness were observed between the three spots for either Cx type.

Conclusions:

  • The diameter of the circumflex artery varies based on heart type.
  • Understanding these anatomical variations can potentially enhance cardiac surgery success rates.
  • This knowledge may contribute to a reduction in iatrogenic circumflex artery lesions.
Abstract

Keywords:
AnatomyLeft coronary arteryMitral valveMitral valve annuloplasty

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