Fig. 3.

A through O illustrate the outcomes of the simulation following the application of the perturbations to channel conductances. The control currents are shown by the red lines in the illustration. Here, A I_Na is Na⁺ current, B I_CaL is L-Type (long-opening) Ca²⁺ current, C I_CaT is T-Type (transient) Ca²⁺ current, D I_Ks is slowly activated outward rectifier K⁺ current, E I_Kr is rapidly activated outward rectifier K⁺ current, F I_t is transient outward K⁺ current, G I_K1 is inward rectifier K⁺ current, H I_NaKp is Na⁺-K⁺ pump current, I I_NaCap is Na⁺-K⁺ exchanger (NCX) current, J I_Cap is sarcolemmal Ca²⁺ pump current, K I_Nab is Na⁺, L I_Cab is Ca²⁺, M I_Kb is K⁺, N I_Clb is Cl⁻ background currents, and O I_hf is hyperpolarization-activated current