Figure 5. Effect of halothane and isoflurane on the cyclic guanosine monophosphate content of endothelium-denuded rat thoracic rings. Rings were preincubated in the presence or absence of lipopolysaccharide (LPS + and LPS-, respectively). Each data point represents mean+/-SEM with n = 6 animals. *P < 0.05 compared to the rings without lipopolysaccharide treatment.