Figure 7-18 Segment shortening data (expressed as a percentage of the control value) during a 15-minute coronary artery occlusion (O) and at various times after reperfusion in the conscious (C) and halothane-anesthetized (H) states. Comparisons are made at various time points with animals anesthetized with halothane for 2.25 hours and allowed to emerge from anesthesia over a 5-hour period but not undergoing coronary artery occlusion and reperfusion. (Adapted from Warltier DC, Al-Wathiqui MH, Kampine JP, Schmeling WT: Recovery of contractile function of stunned myocardium in chronically instrumented dogs is enhanced by halothane or isoflurane. Anesthesiology 69:552–565, 1988.)