Figure 3. Vascular resistance for the three groups of rat liver preparations described in Figure 2. Vascular resistance (in mmHg [middle dot] ml^-1[middle dot] min^-1) was calculated as the quotient of perfusion pressure and flow rate. (A) Average vascular resistance for each group, by minute, during reperfusion. (B) Average vascular resistance +/− SEM for 5-min intervals at the end of the preischemic period, at the beginning of reperfusion, and every 30 min during reperfusion. P < 0.05 *for within-group changes;[dagger] significant between normothermia and mild hypothermia;+significant with respect to preischemia.