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Home / Equine Research Bank / Anat Histol Embryol / Morphological importance of coronary ostia in equine.
Anatomia, histologia, embryologia2022; 51(5); 658-665; doi: 10.1111/ahe.12844

Morphological importance of coronary ostia in equine.

Abstract: The position of the coronary ostia was investigated in 70 segments of the aorta from young adult crossbred horses. After fixation with a 4% buffered aqueous formaldehyde solution and cautious dissection of the aortic bulb, the morphometric relationships between the coronary ostium and the aortic valvar elements were digitally analysed with the support of Image-Pro Plus® software. In horses, the left coronary ostium was near to the right valvular commissure in all cases (100%) analysed in this study. The left coronary ostium was at the level of the intercommissural line in 57.1% and below it in 42.9%. The right coronary ostium was near to the left valvular commissure in 58.6% (2.14 ± 0.32 cm) and close to the right valvular commissure in 41.4% (2.27 ± 0.40 cm). Concerning the intercommissural line, the right coronary ostia was at its level in 24.3% and below it in 75.7%. Accessory coronary ostia were observed in 8.6% of the specimens. In view of the results, it was possible to assume that the positions of the coronary ostia in equines tend towards a standard morphological disposition. Thus, perfusion of the left coronary artery occurs partly more frequently in ventricular systole and complete perfusion occurs less frequently in ventricular diastole. For the right coronary artery, perfusion is mostly complete in diastole and partially in ventricular systole.
© 2022 Wiley-VCH GmbH.
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Publication Date: 2022-07-27 PubMed ID: 35894158DOI: 10.1111/ahe.12844Google Scholar: Lookup
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Summary

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The research article focuses on investigating the positioning and morphological significance of coronary ostia in horses. The findings reveal a trend towards a standard morphological disposition of the coronary ostia in equines, thereby affecting the perfusion of the left and right coronary arteries during different phases of the heart’s cardiac cycle.

Morphological Studies on Equine Hearts

  • The investigation involved the examination of 70 sections from the aortas of young adult crossbred horses. All specimens underwent fixation and careful dissection of the aortic bulb to study the morphometric relationships between the coronary ostium and aortic valve elements.
  • Advanced digital imaging software, Image-Pro Plus®, was utilized to facilitate detailed analysis.

Findings on Coronary Ostia Disposition

  • The left coronary ostium was established to be consistently near the right valvular commissure in all the studied cases.
  • Furthermore, the left coronary ostium was found to be at the level of the intercommissural line in 57.1% of cases, and below the line in 42.9%.
  • The right coronary ostium was observed near the left valvular commissure in 58.6% of cases, while in 41.4%, it was close to the right valvular commissure. Regarding the intercommissural line, the right coronary ostium was observed at its level in 24.3% and below the line in 75.7% of cases.
  • Additionally, an accessory coronary ostium was spotted in 8.6% of the aortal segments.

Coronary Artery Perfusion in Equines

  • Gathering from the ostia disposition results, inferences were made concerning the coronary artery perfusion in horses.
  • For the left coronary artery, it was concluded that the perfusion partially occurs more frequently during the ventricular systole phase of the heart’s cardiac cycle, with complete perfusion occurring less frequently in the diastolic phase.
  • Conversely, the right coronary artery predominantly undergoes complete perfusion during the diastole phase and partial perfusion in the ventricular systole phase.

Cite This Article

APA
Pereira VP, Seyfert CE, Santos JML, de Morais-Pinto L. (2022). Morphological importance of coronary ostia in equine. Anat Histol Embryol, 51(5), 658-665. https://doi.org/10.1111/ahe.12844

Publication

Anatomia, histologia, embryologia
ISSN: 1439-0264
NlmUniqueID: 7704218
Country: Germany
Language: English
Volume: 51
Issue: 5
Pages: 658-665

Researcher Affiliations

Pereira, Vitor P
  • Laboratório de Design Anatômico/LabDA - Departamento de Morfologia, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Seyfert, Carlos E
  • Laboratório de Modelos Anatômicos em 3D/LabMOLA - Departamento de Morfologia, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Santos, João M L
  • Laboratório de Anatomia Animal Comparada, Centro Universitário Funorte, Montes Claros, Minas Gerais, Brazil.
de Morais-Pinto, Luciano
  • Laboratório de Design Anatômico/LabDA - Departamento de Morfologia, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.

MeSH Terms

  • Animals
  • Aorta / anatomy & histology
  • Aortic Valve / anatomy & histology
  • Coronary Vessels / anatomy & histology
  • Diastole
  • Dissection / veterinary
  • Formaldehyde
  • Horses / anatomy & histology
  • Systole

Grant Funding

  • Frigoru00edfico Foresta Ltd.

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Citations

This article has been cited 1 times.
  1. Barszcz K, Goździewska-Harłajczuk K, Czopowicz M, Chłopecka M, Polguj M, Klećkowska-Nawrot J. Morphometry and topography of the coronary ostia in the dog. J Vet Res 2023 Sep;67(3):471-478.
    doi: 10.2478/jvetres-2023-0054pubmed: 37786844google scholar: lookup
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