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Computer Simulation of the Jafri-Winslow Action Potential Model

Computer simulation of the Jafri-Winslow action potential mathematical model reveals that this model does not provide the long term stability of the steady state regime. Under normal conditions (basic cycle length 1000 ms) maximum values of membrane potential, calcium concentrations in different compartments, and the L-type calcium channel current are not consistent with that in the original Jafri-Winslow's paper. The action potential duration restitution curve (S1-S2 protocol) is non-monotonous unlike one in original paper. Under periodic pacing (from 0.5 Hz to 5 Hz), it was impossible to get a stable behavior of the model after 30 s of stimulation unlike to the results presented in the original paper.