Figure 4. Current versus voltage relationship. Averages of peak amplitudes of ICa,L were plotted against command voltages. Records were obtained at 2 to 2.5 min of exposure to each concentration, or 2 to 2.5 min of wash. Data are from five myocytes. ** denotes P < 0.05 for control versus 10 micro Meter, 100 micro Meter, and wash, respectively. * denotes P < 0.05 for control versus 100 micro Meter and wash, respectively (i.e., P > 0.05 for control vs. 10 micro Meter).