Figure 5. Arterial blood pressure and heart rate during anesthesia (the first 2 h) and recovery (the first hour) in patients having received 2 micro gram/kg epidural clonidine in 10 ml saline given in 20 min and followed immediately by an infusion of 0.5 micro gram [center dot] kg^-1[center dot] h^-1(5 ml/h)(group 1, n = 10) or 4 micro gram/kg followed by 1 micro gram [center dot] kg^-1[center dot] h^-1(group 2, n = 20) or 8 micro gram/kg followed by an infusion of 2 micro gram [center dot] kg^-1[center dot] h^-1(group 3, n = 20). During anesthesia, preinduction hemodynamic values were significantly reduced to the same extent in any group considered (P < 0.001). There was no significant intergroup difference.