LIGHT MICROSCOPIC OBSERVATION ON THE SINO-ATRIAL NODE OF THE DOG
- VernacularTitle:狗窦房结形态的光镜观察
- Author:
Genran ZHAO
- Publication Type:Journal Article
- Keywords:
sino-atrial node: P-cell;
Tcell;
dog
- From:
Journal of Xi'an Jiaotong University(Medical Sciences)
1982;0(01):-
- CountryChina
- Language:Chinese
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Abstract:
The sino-atrial node was observed in 23 dog hearts with serial slices. The sino-atrial node lies below auriculocaval junction, beneath the epicardium of sinus venosus by the side of the sulcus terminalis. The shape of the sino-atrial node is a long spindle with a greater upper part and a thiner lower part. Its central area is located near the junction of upper 1/3 and middle 1/3. Its size is 11.06?2.95?1.16mm, The sinoatrial node artery penetrates through the sino-atrial node only in 6 cases. In others, it may be located in sinus venosus side, the atrial side of the node or in the deep myocarium. Within the sino-atrial node there are chiefly P-cell ane T-cells. The P cell is small with greater nuclear, light colored, and formes clusters which present themselves in the centre of the sino-atrial node. The size of the T cell is between P cell and the myocardial working cell and is situated on the peripery of the sino-atrial node. In the sino-atrial node there are large numbers of collagen fibers. The nerve fiber ls appear more abundant near the lower part of the sino-atrial node.
