Electrical activation of the ventricular myocardium of the crocodile Crocodylus johnstoni: A combined microscopic and electrophysiological study

Christian, E. and Grigg, G. C. (1999) Electrical activation of the ventricular myocardium of the crocodile Crocodylus johnstoni: A combined microscopic and electrophysiological study. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 123 1: 17-23. doi:10.1016/S1095-6433(99)00024-0

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Author Christian, E.
Grigg, G. C.
Title Electrical activation of the ventricular myocardium of the crocodile Crocodylus johnstoni: A combined microscopic and electrophysiological study
Formatted title
Electrical activation of the ventricular myocardium of the crocodile Crocodylus johnstoni: A combined microscopic and electrophysiological study
Journal name Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology   Check publisher's open access policy
ISSN 1095-6433
1531-4332
Publication date 1999-05-01
Sub-type Article (original research)
DOI 10.1016/S1095-6433(99)00024-0
Open Access Status File (Author Post-print)
Volume 123
Issue 1
Start page 17
End page 23
Total pages 7
Place of publication Oxford, U.K.
Publisher Pergamon Press/Elsevier
Language eng
Subject 270603 Animal Physiology - Systems
Abstract We mapped the sequence of ventricular depolarization in the crocodile Crocodylus johnstoni. We also attempted to find specialized conduction tissue within the ventricular myocardium. Electrical recordings with miniature multi-point electrodes revealed two strands of rapidly conducting tissue (channels) within the interventricular septum, suggestive of conductive tissue pathways. From these septal channels, wavefronts of excitation swept around each ventricle. Electrical recordings did not indicate that there was conductive tissue in the wall of either ventricle. Similarly, microscopic studies of the septal channels provided no indication of specialized conductive tissue. We suggest that the channels of early septal depolarization provide the crocodile heart with a high speed depolarization pathway functionally analogous to a rudimentary conductive system.
Keyword Activation
Crocodile
Depolarization
Electrical
Heart
Myocardial
Septum
Ventricle
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Originally published as E. Christian and G. C. Grigg (1999) Electrical activation of the ventricular myocardium of the crocodile Crocodylus johnstoni: a combined microscopic and electrophysiological study, Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 123 (1): 17-23. Copyright 1999 Elsevier Science. All rights reserved.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Mon, 08 Aug 2005, 10:00:00 EST by Gordon Grigg on behalf of School of Biological Sciences