Laboratório de Design Anatômico/LabDA - Departamento de Morfologia, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Laboratório de Modelos Anatômicos em 3D/LabMOLA - Departamento de Morfologia, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Anat Histol Embryol. 2022 Sep;51(5):658-665. doi: 10.1111/ahe.12844. Epub 2022 Jul 27.
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.
本研究调查了 70 个杂交马主动脉段的冠状动脉口位置。用 4%缓冲甲醛溶液固定并小心解剖主动脉窦后，利用 Image-Pro Plus®软件对冠状动脉口与主动脉瓣结构之间的形态关系进行数字化分析。在马中，左冠状动脉口在所有分析的病例（100%）中均接近右瓣交界处。左冠状动脉口在房室结线上方占 57.1%，下方占 42.9%。右冠状动脉口接近左瓣交界处占 58.6%（2.14±0.32cm），接近右瓣交界处占 41.4%（2.27±0.40cm）。关于房室结线，右冠状动脉口在其水平上方占 24.3%，下方占 75.7%。在 8.6%的标本中观察到副冠状动脉口。鉴于这些结果，可以假设马的冠状动脉口位置倾向于标准的形态位置。因此，左冠状动脉的灌注在心室收缩期更频繁地发生部分灌注，而在心室舒张期更不频繁地发生完全灌注。对于右冠状动脉，舒张期大部分是完全灌注，收缩期部分是完全灌注。
