Figure 1: Modulation by quercetin of the ionic currents in guinea pig ventricular cardiomyocytes. A: Control. The test pulses were applied 70 mV and -130 mV from a holding potential of -30 mV. B: Quercetin 3 μM. C: Modulation of ICaL in the absence and the presence of quercetin. Current traces at 30 to 70 mV are superimposed. D: Modulation of IK1 by quercetin. Current traces at -130 to -30 mV are presented.