Fig. 4. Force of contraction of isolated human right atrial trabeculae after 15-min exposure to 6% desflurane alone or after 15-min pretreatment with 10 μm glibenclamide (Des + glibenclamide), 800 μm 5-hydroxydecanoic acid (Des + 5-HD), 10 μm HMR 1098 (Des + HMR 1098), 0.1 μm 8-cyclopentyl-1,3-dipropylxanthine (Des + DPX), 1 μm propranolol (Des + propranolol), and 1 μm phentolamine (Des + phentolamine). *P < 0.05 versus 6% desflurane, Des + glibenclamide, and Des + DPX groups. Data are mean ± SD.