Effects of ouabain on [Na+]
in cardiomyocytes. The time-dependent changes in [Na+]i during the treatment with vehicle (open circle), 100 μM ouabain (open square) and 200 μM ouabain (open triangle). The data are the means ± SE from 13 experiments. *P < 0.05 vs vehicle, #P < 0.05 vs 100 μM ouabain. The arrow indicates the application of compounds.