Introduction The purpose of this study was to perform a morphometric examination of the coronary ostia, including their location in the area of the aortic sinuses, and to describe variations in ostia structure in the domestic dog. Material and Methods The study was conducted on the hearts of 91 pedigree dogs of both sexes, aged 1 to 18 years (median 9 years), with a body weight from 1.2 to 65 kg (median 20.7 kg). Morphometric examinations of the coronary ostia were performed in the studied individuals, and the location of the structures in relation to the intercommissural lines was determined. Results Three types of location of the coronary ostia were distinguished, i.e. below the intercommissural line (type I), on the intercommissural line (type II), and above the intercommissural line (type III). In the studied dogs, the most common location of the ostia was type I – found in the left coronary artery of 74/91 dogs (81%) and in the right coronary artery of 42/91 dogs (46%). Morphological variations were shown in 36/91 dogs (40%) in the structure of the coronary ostia, including the presence of accessory ostia. The most common variation was the presence of an accessory ostium near the ostium of the right coronary artery, which was found in 28/91 dogs (31%). Conclusion The results may be useful in developing standards for procedures to replace the whole or part of the aortic valve and repair the coronary artery.

中文翻译：

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狗冠状动脉口的形态测量和地形

简介 本研究的目的是对冠状动脉口进行形态测量检查，包括它们在主动脉窦区域的位置，并描述家犬的冠状动脉口结构的变化。材料和方法 这项研究对 91 只雌雄纯种狗的心脏进行，这些狗的年龄为 1 至 18 岁（中位 9 岁），体重为 1.2 至 65 公斤（中位 20.7 公斤）。对研究个体进行冠状动脉口的形态测量检查，并确定结构相对于连合线的位置。结果冠状动脉口的位置分为三种类型，IE。接合间线下方（I 型）、接合间线上方（II 型）和接合间线上方（III 型）。在所研究的狗中，最常见的孔口位置是 I 型——在 74/91 只狗（81%）的左冠状动脉中发现，在 42/91 只狗（46%）的右冠状动脉中发现。36/91 只狗 (40%) 的冠状动脉口结构出现形态学变异，包括副动脉口的存在。最常见的变异是在右冠状动脉开口附近存在副开口，在 28/91 的狗（31%）中发现了这种情况。结论 该结果可能有助于制定更换整个或部分主动脉瓣以及修复冠状动脉的手术标准。