Objective To investigate the influence of preconditioning with Jiawei Danshen decoction on expression level of autophagy related gene Atg5 and Beclin1 in H9C2 cardiomyocytes during hypoxia/reoxygenation injury.Methods H9C2 cardiomyocytes cultured in vitro were randomly divided into control group( CG),hypoxia/reoxygenation group( HRG),Jiawei Danshen decoction group( JDG),JDG + 3-methyladenine( a inhibitor of autophagy) group( JIG) and JDG +Rapamycin( RAPA)( an agonists of autophagy) group( JAG). The inverted microscope was used...