Objective To observe the effects and mechanism of icarisideⅡ (ICSⅡ)on myocardial ischemia-reperfusion injury in rats. Methods The rats were divided into sham operation(Sham)group,model(Model)group, ICSⅡgroup,Selisistat[(silent information regulator 1,SIRT1)inhibitor]group,and ICSⅡ+ Selisistat group. After pretreatment,the rat model of myocardial ischemia-reperfusion injury was established by ligation of anterior descending branch of left coronary artery. The changes of ventricular function were detected by ultrasound. HE staining was used t...