Characterization of coronary arteries in Giant Anteater (Myrmecophaga tridactyla: Myrmecophagidae)

ABSTRACT Were used twelve (12) adult anteaters (Myrmecophaga tridactyla), adults, 6 (six) males and 6 (six) females, weighing from 20 to 27.32kg from free life. The thoracic cavity was opened until visualization of the whole heart and lungs and later injection of the coronary vessels. The right coronary artery emerged through a single coronary ostium of the aorta, 50%, emitting the intermediate branch and the subsinuous interventricular branch, had a path directed to the subsurface interventricular groove. In the other 50%, the right coronary artery was not present, showing only its branches, intermediate branch and subsurface interventricular branch with emergence of the aorta. Left coronary artery presented, in 83.33%, origin from the aorta in single ostium, issuing the circumflex and interventricular paraconal branches. In 16.66%, the left coronary artery was not evidenced originating from the aorta, but its branches, circumflex and interventricular paraconal.

摘要：本研究纳入12只成年大食蚁兽（Myrmecophaga tridactyla），其中雄性6只、雌性6只，体重介于20~27.32kg，均为野生个体。通过打开胸腔暴露完整心脏与肺脏，随后对冠状动脉进行灌注处理。在50%的受试个体中，右冠状动脉起自主动脉的单个冠状动脉口，发出中间支与窦下室间支，走行方向指向室间沟浅层。剩余50%的受试个体未观察到右冠状动脉主干，仅见其分支（中间支与窦下室间支）直接起自主动脉。左冠状动脉在83.33%的受试个体中，起自主动脉单个冠状动脉口，发出旋支与前室间支。剩余16.67%的受试个体未观察到左冠状动脉主干起自主动脉，但其分支（旋支与前室间支）仍可检出。