(A) Histograms showing the quantification of the cell apoptosis (%) and viability (%) in cardiomyocytes by cadmium (1 or 100 μM for 4–12 h) treatment. (B and C) Western blots and quantifications showing the protein levels of cleaved-caspase 3 and CHOP increased by cadmium (1 or 100 μM for 4–12 h) treatment in cardiomyocytes. Results are averages of four independent experiments. Data represent mean ± S.E.M. *P<0.05, **P<0.01 and ***P<0.001.