犬心肌桥的解剖学观测

目的观测犬心脏心肌桥壁冠状动脉的解剖学特征。方法对41例犬心脏进行大体解剖,充分暴露心肌桥,用游标卡尺测量有关数据。结果41例犬心脏中心肌桥出现29例(70.73%),其中出现1个、2个、3个、4个、5个心肌桥的分别有14例(34.1%)、7例(17.1%)、6例(14.6%)、1例(2.4%)、1例(2.4%);前室间支、后室间支、左室前支、左室后支、左缘支、左圆锥支出现心肌桥的有23例(56.1%)、11例(26.83%)、5例(12.20%)、3例(7.32%)、2例(4.88%)、1例(2.44%)。心肌桥肌纤维与壁冠状动脉的夹角为68.94°±14.38°,心肌桥宽7.77±5.05 mm,心肌桥厚0.56±0.61 mm。结论犬壁冠状动脉心肌桥与人心肌桥相似,犬可作为研究心肌桥的理想动物模型。

Anatomic observation and measurement of myocardial bridge in dogs

Objective To observe anatomic feature of myocardial bridge and mural coronary artery in dogs.Methods Forty-one dog hearts were performed with gross anatomy, myocardial bridge were fully exposed and some related data were measured by vernier caliper.Results Out of 41 cases,29 cases(70.73%) presented myocardial bridge.Among 29 cases,one myocardial bridge,two,three,four and five myocardial bridges occurred in 14 cases(34.1%),7 cases(17.1%),6 cases(14.6%),1 case(2.4%) and 1 case(2.4%),respectively.Twenty-three cases(56.1%),11 cases(26.83%),5 cases(12.20%),3 cases(7.32%),2 cases(4.88%) and 1 case(2.44%) showed in anterior interventricular branch,posterior interventricular branch,left ventricular anterior branches,left ventricular posterior branches,left marginal branch and left branch of conus,respectively.The included angle between muscle fiber of myocardial bridge and mural coronary artery was 68.94°±14.38°.The width and thickness of the myocardial bridge was 7.77±5.05 mm and 0.56±0.61 mm.Conclusion The myocardial bridge and mural coronary artery in dogs are similar to those in human.The dog may be an ideal animal model for studying myocardial bridge.