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本文对13例人心标本房室结和房室束的形态及位置,作了连续切片观察。1.房室结为一扁长形结构,其横切面呈右侧微凸的三角形,有时切面呈梭形或半卵圆形。成人房室结大小为3.5×3.3×1.1 mm~3。有5例房室结表面的右心房心内膜隆起。2.房室结位于二尖瓣与三尖瓣附着缘之间的房室隔内,成人房室结距冠状窦口1.8～5.8 mm,距右心房心内膜0.3～0.7 mm,距三尖瓣隔侧瓣上缘3.3～7.5 mm。结左侧紧贴中心纤维体。3.房室结可分为浅、深两部,浅部纤维纵行止于结的下端。1例深部又分为上、下两部。在结表面右心房心内膜隆起的标本上,结右侧的心房肌覆盖层止于心内膜。结的上缘、右侧面及后缘与房肌相连。4.成人房室束长5.7～7.9 mm,直径1.1～1.5 mm。房室束前部有7例在肌性室间隔顶部;3例在肌性室间隔左侧;2例在肌性室间隔肌肉内部。1例经行特殊,由肌性室间隔顶部至其左侧,最后至肌性室间隔内部偏右侧而终止。
In this paper, 13 cases of human heart atrioventricular node and atrioventricular bundle shape and location, made a continuous slice observation. 1. Atrioventricular junction is a long flat structure, the transverse cross-section is convex to the right of the triangular, sometimes fusiform or semi-oval-shaped section. Adult atrioventricular node size 3.5 × 3.3 × 1.1 mm ~ 3. There are 5 cases of atrioventricular nodal surface of the right atrium endocardial uplift. 2. Atrioventricular node located in the mitral and tricuspid valve attachment between the atrioventricular septum, the adult atrioventricular junction distance from the coronary sinus 1.8 ~ 5.8 mm, from the right atrium of the heart 0.3 ~ 0.7 mm, from the tip The upper edge of the septal flap was 3.3-7.5 mm. Knot left close to the central fiber body. Atrioventricular node can be divided into shallow, deep two, shallow fiber longitudinal stop at the bottom of the knot. 1 case deep is divided into upper and lower two. On the surface of the right atrium in the endocardial protuberance specimens, the junction of the right atrial myocardium stop at the endocardium. Knot on the edge of the right side and the posterior edge of the atrial muscle connected. 4. Adult room bundle length 5.7 ~ 7.9 mm, diameter 1.1 ~ 1.5 mm. There were 7 cases in the anterior chamber of the atrioventricular bundle at the top of the muscular ventricular septum; 3 in the left muscular compartment and 2 in the muscular interventricular septum. One case of special line, from the top of the muscular ventricular septum to the left, and finally to the muscular ventricular septal interior to the right and termination.