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Infarct size in isolated guinea pig hearts exposed to global ischemia/reperfusion (20 min/2 h). Experimental compounds were either administered both before and after ischemia (whole time) or administered only at the onset of reperfusion (@ reperfusion) (mean±SEM; P<0.05 vs control, ANOVA followed by Newman-Keuls post hoc tests for between-group comparisons).
