Document Detail


Regional myocardial blood flow and ventricular arrhythmias following one-stage and two-stage coronary artery occlusion in anesthetized dogs.
MedLine Citation:
PMID:  7113893     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Experiments were performed in 29 anesthetized dogs to compare effects of one-stage and two-stage coronary artery occlusion on ventricular arrhythmias and regional myocardial blood flow (MBF). Two periods of arrhythmias were observed and both were associated with evidence suggesting reentry; i.e., activity in ischemic zone electrograms which bridged the diastolic intervals preceding ventricular ectopic beats. Early ventricular arrhythmias followed progressive deterioration of conduction in the ischemic zone, whereas later arrhythmias occurred unexpectedly with the sudden appearance of bridging activity. One-stage occlusion produced a higher incidence of ventricular arrhythmias and ventricular fibrillation than two-stage occlusion. However, there was no difference in central ischemic zone blood flow, indicating that the protective effect of two-stage occlusion was not due to greater blood flow in this region. There results suggest that factors other than the degree of MBF reduction are important determinants of the incidence and severity of ventricular arrhythmias following coronary artery occlusion.
Authors:
G Kabell; B J Scherlag; R R Hope; R Lazzara
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  American heart journal     Volume:  104     ISSN:  0002-8703     ISO Abbreviation:  Am. Heart J.     Publication Date:  1982 Sep 
Date Detail:
Created Date:  1982-10-12     Completed Date:  1982-10-12     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0370465     Medline TA:  Am Heart J     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  537-44     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Anesthesia, General
Animals
Arrhythmias, Cardiac / etiology,  physiopathology*
Coronary Circulation*
Coronary Vessels*
Dogs
Electrocardiography
Heart Conduction System / physiopathology
Myocardial Contraction
Time Factors
Grant Support
ID/Acronym/Agency:
HL 23599/HL/NHLBI NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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