Open AccessAngioarchitecture of the coronary arteries in Mazama gouazoubira (G. Fischer, 1814)
Author(s) -
Milena Sorban Zaniboni,
Wilson Viotto de Souza,
Drielly Gomes Assis Samora,
Fernanda Coelho Simas Bernardes,
André Luíz Quagliatto Santos,
Amarílis Díaz de Carvalho,
Paulo de Souza
Publication year - 2021
Publication title -
acta veterinaria brasilica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 8
ISSN - 1981-5484
DOI - 10.21708/avb.2021.15.4.10007
Subject(s) - circumflex , medicine , right coronary artery , cardiology , coronary arteries , artery , left coronary artery , dominance (genetics) , anatomy , biology , coronary angiography , myocardial infarction , biochemistry , gene
Mazama gouazoubira is a widely distributed deer in the South American continent. However, studies on its anatomical characteristics are still scarce. The objective of this study was to elucidate the coronary circulation of M. gouazoubira. With this aim, after collecting cadavers on highways, twenty-four hearts injected with latex and preserved in formaldehyde at 10% were dissected. The dissections revealed that all specimens presented left coronary dominance, characterized by the origin of the subsinuous interventricular branch from the circumflex branch of the left coronary artery. The number of ventricular branches originated from branches of the left coronary artery was approximately five times higher than that of the right coronary artery. The occurrence of myocardial bridges was registered in 91.7% of the individuals, with bridges predominating over the paraconal interventricular branch. The mean length of the paraconal interventricular sulcus was significantly higher in males (p = 0.02). The number of atrial branches and ventricular branches, length of myocardial bridges and length of subsinuous interventricular sulcus did not vary significantly between sex. Left coronary dominance and high frequency of myocardial bridges in M. gouazoubira are preponderant anatomical traits also present in different species of Ruminantia suborder. Coronary dominance studies in other South American deer species may confirm the correlation of this trait with the evolutionary history of these animals.