RESUMO
Objective To observe the protective effects of Diemailing Injection(DMLI) on experimental myocardial infarction in rats and its mechanism.Methods The experimental myocardial infarction model was induced by left anterior descending coronary occulusion for 24 h in rats.The rats were randomly divided into sham group,myyocardial infaction model group,DMLI groups with different doses(2.5,5.0,10.0 mL?kg~(-1))(n=20).The changes of myocardial infarction size(MIS),aspartate aminotransferase(AST),actate dehydrogenase(LDH),creatine phosphokinase(CK),superoxide dismutase(SOD) and glutathione peroxidase(GSH-Px) activities and malondialdehyde(MDA) content in serum,endothelin(ET) and angiotensinⅡ(AngⅡ) levels in plasma,and low shearing specific viscosity,middle shearing specific viscosity and high shearing specific viscosity of blood and specific viscosity of plasma were determined.At the same time,myocardial free fatty acid(FFA) contents of infarction and noninfarction area were determined.Results In rats treated by DMLI(in doses of 2.5,5.0 and 10.0 mL?kg~(-1) i.v after coronary occulusion),the MIS was significantly reduced(P