Platelet induced aggravation of acute ischaemia in an isolated rabbit heart model
- 1 April 1987
- journal article
- research article
- Published by Oxford University Press (OUP) in Cardiovascular Research
- Vol. 21 (4), 293-298
- https://doi.org/10.1093/cvr/21.4.293
Abstract
In isolated coronary ligated rabbit hearts the effects of washed human platelets on the size of the epicardial ischaemic area and on recovery from ischaemia during 60 min of reperfusion was evaluated by endogenous NADH-surface-fluorescence photography. Infusion of washed human platelets to non-ischaemic control hearts produced a decrease in left ventricular pressure to 64(3)% of control (n=4), no change in global coronary flow rate, no retention of platelets (recovery 108(9)%), and no alteration in basal NADH-fluorescence. When platelets were infused into coronary ligated hearts, however, the size of the epicardial ischaemic area was significantly enhanced to 127(8)% (n=5) of control. Moreover, this increase in size was negatively correlated with the recovery of platelets in the coronary effluent: the lower the recovery rate the larger the ischaemic area (y=253-1.44x, r=-0.855, n=15, p<0.001). When platelet infusion was stopped after 30 min the enlargement of the ischaemic area seemed to be reversible. When the coronary ligature was released, however, and the ischaemic myocardium reperfused the recovery from ischaemia was retarded in the platelet treated hearts as shown by functional (left ventricular pressure and flow) and metabolic (NADH-fluorescence) indices. Thus it is directly shown for the first time in an isolated in vitro heart preparation that platelets aggravate myocardial ischaemia.Keywords
This publication has 15 references indexed in Scilit:
- ROLE OF LEUKOCYTES IN ACUTE MYOCARDIAL-INFARCTION IN ANESTHETIZED DOGS - RELATIONSHIP TO MYOCARDIAL SALVAGE BY ANTI-INFLAMMATORY DRUGS1984
- Inhibitory Role of the Endothelium in the Response of Isolated Coronary Arteries to PlateletsScience, 1983
- Reduction of the extent of ischemic myocardial injury by neutrophil depletion in the dog.Cell Metabolism, 1983
- LEUKOCYTE CAPILLARY PLUGGING IN MYOCARDIAL ISCHEMIA AND REPERFUSION IN THE DOG1983
- The effect of ibuprofen on accumulation of indium-111-labeled platelets and leukocytes in experimental myocardial infarction.Circulation, 1982
- Prostacyclin-thromboxane interactions in the platelet-perfused in vitro heartAmerican Journal of Physiology-Heart and Circulatory Physiology, 1981
- Prevention of infarction-induced decrease in circulating platelet count by prostacyclinThrombosis Research, 1980
- Preservation of ischemic myocardium by pinane thromboxane A2American Journal of Physiology-Heart and Circulatory Physiology, 1980
- Correlation of Activation and Aggregation of Platelets. Discrimination between Anti-Activating and Anti-Aggregating AgentsPathophysiology of Haemostasis and Thrombosis, 1979
- The wavefront phenomenon of ischemic cell death. 1. Myocardial infarct size vs duration of coronary occlusion in dogs.Cell Metabolism, 1977