Figure 2. Inhibition of I _KAS with amiodarone is reversible.

(A) Superimposed I _K traces in conditions as labeled. I _K was obtained with the ramp pulse protocol shown in the inset, and normalized with cell-capacitance. Intrapipette Ca²⁺ was 1 µM. (B) Time course of I _K measured at a membrane potential of 20 mV. The dotted line indicates the level of baseline I _K. AMD indicates amiodarone.