Fig. 1From: Comparison of the myocardial protective effect of sevoflurane versus propofol in patients undergoing heart valve replacement surgery with cardiopulmonary bypassThe changes of auditory evoked potential index (AEPi) in the two groups. The changes of AEPi were kept similar in pre-anaesthesia, intubation, pre-CPB, during CPB, after CPB and the end of operation between the two groups, respectively. CPB = Cardiopulmonary bypassBack to article page