Anaesthesia
Anaesthesia chart were recorded standardly based on the guidelines of Chinese Society of Cardiothoracic and Vascular Anesthesiology and combined intravenous and inhalation anesthesia were used in all patients.
There were no differences with respect to the ASA PS III(American Society of Anesthesiologists Physical Status)(P=0.102) while significantly more ASA PS II patients in Delirium group, no significant difference was observed in duration of the surgery and duration of anesthesia, and preoperative anxiety. There were no significant differences as to dexmedetomidine and propofol use (P=0.256, P=0.278). In Delirium group, patients had significantly more EBL and intraoperative blood transfusion (P<0.001, P=0.003), and furthermore significantly lower LMAP (P<0.001) was recorded in Delirium group while no difference was detected as to LHR between two groups (P=0.102). (Table 3).