(A) Representative images of myocardial infarction in rats visualized by TTC staining and analysis of the infarct size. (B) Rat cardiomyocytes stained with H-E. (C) Representative images and analysis of TUNEL staining. (D,E) LDH (D) and CK-MB (E) levels in serum. The data are expressed as the mean ± standard deviation, n=6. The t test was employed to analyze comparisons between two groups. *P<0.05, compared with the MI/R + Dex group.