Figure 5: SIR did not lead to MMP dissipation after SI treatment. MMP levels of SI and SIR-0.5 h groups in the models 1-6 when using H9c2 cells. FITC-positive percentage of cells refers to the FITC-positive cells/total cells; geometric mean refers to the geometric mean of FITC fluorescence intensity. Data are presented as mean ± SD (n = 3–4). *P < 0.05, †P < 0.01 compared to control group. SI: Simulated ischemia; SIR: Simulated ischemia-reperfusion; MMP: Mitochondrial membrane potential. NS: No significance; SD: Standard deviation; FITC: Fluorescein isothiocyanate.