犬心房内刺戟伝導系の組織学的研究(第1報) : 靜脈洞結節及び田原氏結節に就て
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The specific conducitng systems in the atrial portion have been discussed physiologically and histologically by many investigators for a long times. Namely, on one hand, Rothberger & Scherf, Condrelli, Maekawa, Takayasu, Koch, Monckeberg, Holmes, Tandler, Thorel, Nomura, Wakayama and Kung have affirmed its existence. On the other hand, Glomset & Birge, Tamura, Sodi-pallares, Koor were not agreeable. The author performed the histological examination to expain the point of these rival opinions.Methods : The atrial portion in normal 34 dog's hearts were studied by means of the serial transverse and longitudinal sections. The sections of the heart muscles were stained mainly by the Van-gieson's method, and for reference, some by the Best's carmin glycogen method and Mallory's azan method.Standard of the specific muscular fibers : They were the speciallized muscles in the group of the connective tissue, nervous tissue and arteries etc. as the muscular bundles which were similar to the so-called Purkinje's fibers, namely rich in protoplasma and poor in myofibrille with small and massed muscles. Also in the atrial portion, they were finer than the ordinary heart muscles and similar to the tissue of the sinus node and the Tawara node.Results : In this report, mainly, the sinus node and Tawara node were examined. The results were as follows.1) The sinus node was observed. clearly in all the investigated dog's hearts. They were organized by so-called specific cardiac muscular fibers. The findings of the situation, form and fine structure were nearly agreeable with the past reports by many investigators (Keith & Flack, W. Koch and the others).2) The Tawara node was observed clearly in all the hearts.A) Histological fine structure was nearly the same as the findings reported by Tawara and the other investigators.B) On the situation of the Tawara node; In 7 cases of the 26 dogs sacrificed for this study, they were situated near the coronary sinus. In another 19 cases, ther were situated at the Trigonum fibrosum dextrum from the middle part of the atrial septum.C) On the form of the Tawara node at the Trigonum fibrosum dextrum; It formed a triangular shape so that the base was at the aortic side and apex was at the orifice of the coronary sinus. A further triangular conical shape that had the base built by this triangle was formed. The apex of the triangular conical shape was connected with the Systema septo-angularis anterior, to be stated later. And the apex of the side to the coronary sinus was connected with the left and right atrial bundles. The apex to the Septum membranaceum was connected with the His bundle.D) The so-called second node stated by Freund, Takahashi and Fukuhara was not found near the orifice of the coronary sinus.
- 社団法人日本循環器学会の論文
- 1959-08-20
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