Document Detail


Inotropic changes in ischaemic and non-ischaemic myocardium and arrhythmias within the first 120 minutes of coronary occlusion in pigs.
MedLine Citation:
PMID:  3663023     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In 16 anaesthetized open-chest pigs occlusion of the distal third of the LAD was performed. Local myocardial contractility within and outside the ischaemic area, measured using electromagnetic and ultrasonic probes, arrhythmias and plasma catecholamine concentrations were monitored during 180 min before and 120 min after occlusion of the distal LAD. 5 pigs developed ventricular fibrillation (VF) during phase 1 a of arrhythmias (1-6 min post occlusion) and a further 5 pigs during phase 1 b (10-30 min post occlusion). Segment lengthening within the ischaemic area, measured at the beginning of ventricular ejection, started within a few seconds of ischaemia and reached 11-13.5% of end-diastolic length prior to occlusion after 2 min of ischaemia. Between 2 min and 120 min after the onset of occlusion, no further segment lengthening was observed. There were no significant differences in segment lengthening between VF and non-VF pigs. However, within the VF group, mechanical alterations 2 min after the onset of ischaemia were more marked in pigs developing VF within phase 1 a than those with VF in phase 1 b. VES increased markedly after 50 min of occlusion and seemed to occur independently of further mechanical alterations, VF within the first 30 min of ischaemia often occurred without preceding VES.
Authors:
H Hirche; M Hoeher; J H Risse
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Basic research in cardiology     Volume:  82 Suppl 2     ISSN:  0300-8428     ISO Abbreviation:  Basic Res. Cardiol.     Publication Date:  1987  
Date Detail:
Created Date:  1987-11-19     Completed Date:  1987-11-19     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0360342     Medline TA:  Basic Res Cardiol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  301-10     Citation Subset:  IM    
Affiliation:
Institut für Angewandte Physiologie, Universität Köln, F.R.G.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arrhythmias, Cardiac / physiopathology*
Coronary Disease / physiopathology*
Coronary Vessels / physiology*
Epinephrine / blood
Female
Heart / physiology,  physiopathology*
Kinetics
Male
Myocardial Contraction*
Norepinephrine / blood
Swine
Systole
Chemical
Reg. No./Substance:
51-41-2/Norepinephrine; 51-43-4/Epinephrine

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


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