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AP and major membrane currents at pacing frequencies of 0.5 Hz (thick solid trace), 1 Hz (thin solid trace), and 2 Hz (dashed trace). (A) AP. (B) Experimental APs from Fig. 1 A in Li et al. (1999). (C) IKr; (D) INaCa; (E) IKs; (F) INaCa; (G) Ito1; (H) INab; (I) IK1; (J) ICaL; and (K) INa.
