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. 2023 Jun;47(2):745-752.
doi: 10.1007/s11259-022-10035-4. Epub 2022 Nov 16.

The right coronary artery in the heart of chinchilla (Chinchilla laniger Molina)

Jacek Kuchinka  1 , Małgorzata Radzimirska  2 , Dariusz Banaś  3 , Elżbieta Nowak  2 , Aleksander Szczurkowski  4
Affiliations

The right coronary artery in the heart of chinchilla (Chinchilla laniger Molina)

Jacek Kuchinka et al. Vet Res Commun. 2023 Jun.

Abstract

The pattern of normal coronary vascularization in a mammalian heart includes the presence of both right and left coronary arteries. According to the literature data, the presence of single major coronary arteries is mainly related to cardiac abnormalities. Previously it has been reported that the right coronary artery is absent in the coronary vascularization of the heart in the chinchilla. Our research was carried out on thirty chinchillas (Chinchilla laniger Molina). The coronary vessels were filled with colored latex to render them visible. The examinations were supplemented additionally with the use of microcomputed tomography with arterial contrast. Our study demonstrates its undoubtedly presence of the right coronary artery. In all subjects the right coronary artery was present, as was the left coronary artery. Two types of right coronary artery were found. Our results indicate that the normal pattern of coronary vascularization of heart in chinchilla includes both the right and left coronary arteries. An open question remains the presence of single coronary artery is a normal pattern of cardiac arterial vascularization in chinchilla.

Keywords: Anatomy; Chinchilla; Coronary arterial system.

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Conflict of interest statement

The authors declare no competing interests.

The authors have no conflicts of interest to declare that are relevant to the content of this article. The research conformed with the requirements of Act for the Protection of Animals Used for Scientific or Educational Purposes (15 January 2015). According with Polish Law: “Studies of tissues obtained post-mortem do not require the approval of an ethics committee”.

Figures

Fig. 1
Fig. 1
Arterial vascularization of the chinchilla’s heart. A—gradual corrosion arterial specimens (right antero-lateral aspect), C – gradual corrosion arterial specimens (basal aspect); B, D – micro-CT view of coronary arteries (MIP inverse – maximum intensity projection); E – internal openings of the coronary arteries (RCA and LCA) – macroscopic view, dashed line – sinotubular junction; F – aortal bulb with RCA and LCA corrosion cast
Fig. 2
Fig. 2
Arterial vascularization of the chinchilla’s heart. A – branches of the coronary arteries (atrial surface); B – right coronary artery (RCA) – type I (right antero-lateral aspect); C—right coronary artery (RCA) – type II (right antero-lateral aspect); D—right coronary artery (RCA) – intermediate variant (right antero-lateral aspect); E—right coronary artery (RCA) – fetal gradual corrosion specimen; F – left coronary artery (LCA) – vascular specimen (left lateral view). a – right coronary artery (RCA). b – accessory right coronary artery. c—right circumflex branch of the RCA. d – marginal branch of the right ventricle. e – ventricular branches of the RCA. f – paraconal branch of the pulmonary trunk. g – sinoatrial nodal branch. h – arterial branches. i – left coronary artery (LCA). j – interventricular paraconal branch of the LCA. k – left circumflex branch of the LCA. l – septal branch. l*—distal part of the septal branch. m – interventricular branches of the LCA. n – aortal bulb. o – pulmonary trunk, place of the cut-off is indicated by a dashed line. p – left auricle of atrium. r – right auricle of atrium (cut off). s – atrioventricular nodal branch. t – subsinuosal interventricular branch. u – conus of pulmonary trunk. VD – right semilunar cusp. VS – sinister semilunar cusp
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