Figure 5. Percentage relaxation of the U46619-preconstricted rat coronary microvessel in response to changes in pressure gradients ([Greek small letter delta]P) across the vessel in the presence or absence of desflurane. Data are the mean +/- SD. [Greek small letter delta]P-produced, flow-induced dilation was significantly attenuated by either 1 or 2 MAC desflurane (P < 0.001 each). *P < 0.05 versus control.