Figure 4. Cortical oxygen saturation (ScO(2)) and cortical temperature (Tcortex) during reperfusion after hypothermic arrest in the pH-stat and alpha-stat groups. CPB = cardiopulmonary bypass. Mean +/- SD. n = 8 animals per group. *P < 0.05 between groups. The ScO(2) and Tcortexincreased significantly with time in both groups.