Fig. 3.

Simulated I–V relationships with 10 and 11.2 mM intracellular [Na⁺] ([Na⁺]_i). A: simulation of I_p with [Na⁺]_i taken as cellular (pipette) [Na⁺] of 10 and 11.2 mM. B: simulation of I_NCX with intracellular Ca²⁺ concentration kept constant at 100 nM for cellular [Na⁺] of 10 and 11.2 mM. The actual experimental data under CTR conditions and after 2-meSATP application were also plotted for comparison with the simulation.