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VF dynamics. (Upper) Distributions of Vm, Vopt, Ca, and Caopt at the same instance in time (868 ms) into an episode of VF. (Lower) Comparison of Vm/Ca traces (blue/red) and Vopt/Caopt traces (orange/green) taken from the central recording site in Fig. 1. Black arrows indicate additional inflections in the Vopt signal. Please see online version for color descriptions.
