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Figure 4


Fig. 4. Voltage dependence of inactivation and activation kinetics of INa in atrial and ventricular myocytes of the rainbow trout heart. (A) Representative tracings of INa at -20 mV. (B) Mean (± s.e.m.) time constant of inactivation ({tau}) and (C) time-to-peak current at different voltages. The results are means (± s.e.m.) of 12-14 myocytes. Asterisks show a significant difference (P<0.05) between atrial and ventricular myocytes.