Ayettey A S, Navaratnam V, Yates R D
Department of Anatomy, Tulane University Medical School, New Orleans, Louisiana 70112.
J Anat. 1988 Jun;158:77-90.
Ultrastructural studies of the rat atrial myocardium reveal that the specialised myocardial cells can be distinguished from the usual atrial myocytes by their lack of specific atrial granules. On the basis of this distinction it has been shown that there is interposition of atrial myocardial tissue in the pathway between the two nodes and that there are no morphologically specialised internodal pathways. The atrial myocardial cells themselves exhibit variations in their content of cytoplasmic organelles such as myofibrils, T-tubules and sarcoplasmic reticulum but they all contain membrane-bound specific atrial granules.
对大鼠心房肌的超微结构研究表明，特殊心肌细胞可通过缺乏特定心房颗粒与普通心房肌细胞区分开来。基于这一区别，已证实在两个结之间的路径中存在心房肌组织的插入，且不存在形态学上特殊的结间路径。心房肌细胞自身在细胞质细胞器（如肌原纤维、T小管和肌浆网）的含量上存在差异，但它们都含有膜结合的特定心房颗粒。
