Figure 1.
Simulated action potential and currents of a human atrial myocyte. The model of Grandi et al. (2011) was used to calculate the (A) membrane voltage and underlying currents at a pacing rate of 1 Hz. The action potential was triggered by a stimulus current at t = 50 ms. The inward rectifier K+ current is shown in B. Currents through the Na+-K+ pump and Na+-Ca2+ exchanger are displayed in C and D, respectively.
