PASSIVE ELECTRICAL-PROPERTIES OF AV NODE REGION OF RABBITS HEART

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  • 1 January 1977
    • journal article
    • research article
    • Vol. 22  (3) , 499-504
Abstract
Passive electrical properties of the AV [atrioventricular] node region of the rabbit heart were studied. Electrotonic anisotropism was characteristic of the entire AV node and was largest in the region of entry from the crista terminalis and in the lower node. The input resistance of AV node was 1.3 to 2-fold that measured in atrial trabeculae. Analysis of the results yielded the following specific resistance values for the midnodal region: 1 .OMEGA. .cntdot. cm2 for contacts, 1200 .OMEGA. .cntdot. cm for the intracellular space and 1300 .OMEGA. .cntdot. cm2 for the electrogenic membrane. The nature of intercellular interaction and AV delay is discussed.