Effect of naringenin on antioxidant parameter of H/R in H9c2 cardiomyocytes cells. A) CAT, B) GSH-Px, C) SOD and D) MDA. The data presented as means±SD from three independent experiments. ##P < 0.01 versus control group; *P < 0.05, **P < 0.01 versus H/R group.