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- W76101621 abstract "Several studies have shown that postischemic myocardial dysfunction (myocardial stunning) is attenuated by antioxidants, implying a pathogenetic role of oxy-radicals in this phenomenon. However, since all these studies have been performed in open-chest preparations, artifacts due to anesthesia, trauma, and other nonphysiologic conditions cannot be excluded. Accordingly, chronically instrumented dogs underwent a 15-minute occlusion (o) of the left anterior descending artery followed by reperfusion. Dogs received i.v. either saline or superoxide dismutase (SOD) plus catalase (CAT) (16,000 U/kg and 55,000 U/kg, respectively, over 1 hour starting 15 minutes before O). Regional myocardial function was assessed as systolic wall thickening (WTh) using a pulsed Doppler probe. WTh after reperfusion was significantly greater in treated dogs, and this difference could not be ascribed to differences in collateral flow or hemodynamics. The authors conclude that SOD plus catalase attenuate myocardial stunning in the conscious dog, indicating that oxy-radicals play a pathogenetic role in this phenomenon under physiologic conditions." @default.
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- W76101621 title "Antioxidant enzymes attenuate myocardial stunning in the conscious dog" @default.
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