Fig. 3. Summary of adenosine triphosphate–sensitive potassium current (IKATP) activation by pinacidil in the absence and presence of isoflurane at 0.5 and 5.0 mm intracellular ATP. At 0.5 mm ATP, the density of pinacidil activated IKATPwas significantly increased after 10-min pretreatment with isoflurane (*P < 0.05, isoflurane + pinacidil vs. pinacidil alone; n = 8). At 5.0 mm ATP, the density of pinacidil-activated IKATPwas not significantly changed in the presence of isoflurane (P = 0.292; n = 6).