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- W2073039170 abstract "Summary: This study was performed to evaluate the effects of superoxide dismutase, a scavenger of superoxide anions, on leukocyte accumulation and myocardial injury in a canine preparation of myocardial infarction. Dogs underwent occlusion of the left circumflex coronary artery for 90 min, followed by a reperfusion for 6 or 24 h. The dogs received either saline or superoxide dismutase (5 mg/kg), beginning 15 min before coronary occlusion and ending 15 min after coronary reflow. Myocardial infarct size, expressed as a percentage of the area at risk, was significantly less in superoxide-dismutase-treated dogs that underwent reperfusion for 6 h, 17.5 ± 1.7, or 24 h, 25.8 ± 3.6, compared to saline-treated dogs that underwent reperfusion for 6 h, 42.7 ± 4.4 (p < 0.05), or 24 h, 53.0 ± 6.1 (p < 0.05). The differences in infarct size were not due to differences in myocardial oxygen demand. Superoxide dismutase had no effect on regional myocardial perfusion of the ischemic bed. Accumulation of 111indium (In)-labeled autologous leukocytes within the area at risk was similar in control and superoxide-dismutase-treated dogs (p > 0.05). The results suggest that oxygen radicals play a role in the extent of injury due to regional myocardial ischemia followed by reperfusion, and the protective effect of free radical scavengers may be sustained beyond the expected plasma half-life of the administered agent." @default.
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- W2073039170 date "1988-01-01" @default.
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- W2073039170 title "Sustained Limitation by Superoxide Dismutase of Canine Myocardial Injury Due to Regional Ischemia Followed by Reperfusion" @default.
- W2073039170 doi "https://doi.org/10.1097/00005344-198801000-00006" @default.
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