魚類心臓の歩調とりに関する電気生理学的研究

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概要

• 論文の詳細を見る

• The transmembrane action potential was recorded from cardiac muscle fibers in several kinds of fish. The action potential with slow diastolic depolarization, which is characteristic feature of automatic fibers, was found in sinus venosus, sinoatrial valve (S-A valve), atrioventricular funnel and bulvoventricular junctional region. The amplitude of the action potential recorded from such tissues (range; 50-110mV) was generally less than those of atrium and ventricle (range; 80-120mV). Duration of the action potential was ranged from 400 to 600 msec in the sinus venosus, the S-A valve and the ventricle, from 400 msec to 2.5 sec in the atrioventricular funnel and the bulvoventricular junctional region and from 150 to 300 msec in the atrium. On the basis of distribution of the pacemaker sites, fish hearts employed in these experiments could be classified into three groups as follows. a; The heart with the pacemaker localized in sinus venosus, S-A valve, atrioventricular funnel and bulvoventricular junctional region. This type of heart was observed in a part of elasmobranchs and of long thin teleosts. b; The heart with the pacemaker localized in S-A valve, atrioventricular funnel and bulvoventricular junctional region. This type of heart was observed in a part of marine teleosts. c; The heart with the pacemaker located in S-A valve and atrioventricular funnel. This type of heart was observed in a part of fresh water teleosts.

• 社団法人日本動物学会の論文
• 1969-08-15

著者

• 斎藤 建彦

  聖マ医大・生理

• 斎藤 建彦

  東京女子医科大学第二生理学教室

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