Representative histology pictures of postmortem apoptosis and fibrosis. A. and B. Apoptosis in the heart tissue as revealed by the TUNEL apoptosis detection kit. C. and D. Photomicrographs of representative myocardial sections stained with Masson’s trichrome. Myocardium (red) was replaced by fibrous tissue (blue) in all groups in different degrees. Data are shown as means ± SEM. *p< 0.05, ***p< 0.01 vs. PBS group.