(a)
(b)
(c)
(d)
Figure 4: Effects of STV on and L-type calcium current of guinea pig ventricular myocytes. (a) and (b) show the representative currents and the mean current densities of tail current at +40 mV for STV-preincubated and control group. (c) and (d) show the representative currents and mean current density of L-type calcium current at +10 mV for STV-preincubated and control group, respectively. Cells were incubated with STV for no less than 1 hour before and recordings.