牛右心室节制索及右束支的解剖观测

Anatomic Observation of the Moderator Band and Right Bundle Branch in Right Ventricle of Bovine Heart

目的了解牛右心室节制索及右束支的形态特点及分布规律,为比较解剖学和兽医学积累解剖学资料。方法24例新鲜市售牛心,用大体解剖和墨汁灌注方法显示牛右心室传导系。肉眼观察右心室内各结构的形态和分布,用游标卡尺测量数据,SPSS统计软件处理相关数据。结果节制索多为扁圆柱状(90.5%),长(45.48±1.32)mm,长直径(3.78±1.54)mm,短直径(2.55±1.26)mm,右束支长(65.52±20.78)mm,直径(1.45±0.56)mm。发现1例双节制索。Purkinje纤维的分布第Ⅰ、Ⅱ象限最密集,第Ⅲ三象限较少分布,第Ⅳ象限分布最少。结论牛心节制索的形态与其他哺乳动物相似,其中有右束支穿行,其表面有分布不均的Purkinje纤维。

Objective To study the morphological characteristics and distribution rule of the moderator band and right bundle branch in right ventricle of bovine heart and to accumulate data for comparative anatomy and theriatrics. Methods Twenty-four fresh bovine hearts were studied with gross anotomy and ink was peffused to display the conduction system of the right ventricle. The shape and distribution of the various structures of the right ventricle were observed and measured by vernier caliper and analyzed by SPSSI4.0 statistics soft. Results Moderator band mostly showed fiat cylindrical appearance （90.5%）, the length of it was （45.48 ± 1.32）mm, the maximunl diameter was （3.78 ± 1.54）mm, the minimum diameter was （2.55 ± 1.26）mm, the length of the right bundle branch was （65.52 ± 20.78）mm and the diameter of it was （1.45 ±0.56）mm. One bovine-heart with double moderator bands was observed . The distribution of Purkinje fibers was most crowded in Ⅰ and Ⅱ quadrant, hut less in Ⅲ quadrant and least in Ⅳ quadrant. Conclusion The morphous of moderator band of bovine heart is similar to other mammals, with right bundle branch passing and Purkinje fibers distributing on the surface.