Figure 5. The correlation of increases in nitric oxide (NO) concentration with bradykinin-induced increases in coronary flow in the absence and presence of 0.5% halothane (A) and 1% halothane (B). The x and y- coordinates represent individual data points. Equations are of the form y = mx + b, where x -= intercept and m = slope +/- 95% CIs, and R²= correlation coefficient. Each slope is significant. There is no difference between control and halothane slopes.