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. 2017 Jul 3;149(7):683–687. doi: 10.1085/jgp.201711826

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© 2017 Sachse et al.

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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.