Fig. 2. Concentration–response curves to papaverine (10−7to 10−4m) in the absence and presence of etomidate (10−4m), midazolam (10−6m), and glibenclamide (10−6m) obtained in rat thoracic aortas without endothelium. Data are shown as mean ± SD and expressed as the percentage of maximum relaxation induced by papaverine (3 × 10−4m). The number of rats from which the aortas were obtained is shown.
