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pubmed-article:2468494pubmed:abstractTextThe aim of the study was to examine a possible role for platelet activating factor (PAF) in experimental myocardial ischaemia and reperfusion. Anaesthetized open-chest greyhounds were subjected to 40 min of coronary artery (LAD) occlusion followed by reperfusion. Blood samples for platelet counting were obtained from a local coronary vein draining the ischaemic region. Pretreatment with PAF antagonists BN52021 (5 mg kg-1 i.v.) or SRI63441 (10 mg kg-1 i.v.), 15 min prior to occlusion reduced the ventricular ectopic count during the ischaemic period from 614 +/- 82 (controls) to 296 +/- 145 (BN52021) and 474 +/- 200 (SRI63441). Both drugs also reduced the incidence of ventricular fibrillation (VF) (during ischaemia and reperfusion) from 90% (controls), to 50% (BN52021) and 43% (SRI63441). Ischaemia was accompanied by a 32 +/- 7% reduction in coronary venous platelets; this was attenuated by both BN52021 (-2 +/- 6%) and SRI63441) (-1 +/- 5%). These results suggest that PAF may contribute to ischaemia and reperfusion-induced arrhythmias by activating platelets.lld:pubmed
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pubmed-article:2468494pubmed:articleTitleThe effects of PAF antagonists on arrhythmias and platelets during acute myocardial ischaemia and reperfusion.lld:pubmed
pubmed-article:2468494pubmed:affiliationDepartment of Physiology and Pharmacology, University of Strathclyde, Glasgow, Scotland, U.K.lld:pubmed
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pubmed-article:2468494pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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