Fig. 5. Perioperative changes in tissue factor expression on monocytes. Perioperative increase in this antigen, which reflects the prothrombic state, was attenuated in the milrinone-treated group [Mil(+)] compared with the group not treated with milrinone [Mil(−)] (mean ± SD, n = 17/group). Open bars = Mil(−) group; solid bars = Mil(+) group. * P < 0.01 compared with baseline (0 h) in each group. † P < 0.01 compared with Mil(−) at each time point. MFI = mean fluorescence intensity .