AIM:To investigate the relationship between cardiomyocyte injury induced by hypoxia and expression of microRNA-214(miR-214).METHODS:The expression changes of miR-214 mRNA were detected using real-time qPCR technology.Cardiomyocytes were cultured and divided into four groups:normoxia culture group(control),normoxia culture plus miR-214 inhibitor group,hypoxia culture group,and hypoxia culture plus miR-214 inhibitor group.The proliferation of cardiomyocytes in each group was evaluated by MTT assay,apoptosis r...