Fig. 7.

The developed tension and ATP usage of the new hybrid contraction model, when incorporated in the human ventricular cell (HuVEC) model at the stimulus interval of 800 ms. a V _m, b F _b, c [Ca²⁺]_cyt, d ATP consumption by the CB, SR Ca²⁺-ATPase (SERCA), and Na/K pump (I _NaK), e time courses of CB states, f major ionic currents