In the Remimazolam group as an induction dose 6 mg/kg/h of remimazolam with 0.5-1.0 mcg/kg of sufentanil was injected together. If consciousness was lost, rocumerone 1 mg/kg was given intravenously, and endotracheal intubation was performed when sufficient muscle relaxation was achieved 2 minutes later.

Maintenance of anesthesia is achieved by using a programmed infusion pump with remimazolam 1 mg/kg/h (up to 2 mg/kg/h) and sufentanil effect site concentration of 0.4 to 0.5 to reach the appropriate depth of anesthesia. The optimal level of anesthesia is based on maintaining a bispectral index (BIS) of 35-65.

After injection of 2-5 mg of midazolam and 0.5-1.0 mcg/kg of sufentanil as an induction dose, 1 mg/kg of rocumerone is given intravenously when consciousness is lost, and endotracheal intubation is performed when sufficient muscle relaxation is achieved 2 minutes later. For maintenance of anesthesia, the concentration of sevoflurane and sufentanil effect site concentration is 0.4 to 0.5 to reach the appropriate depth of anesthesia, and the optimal degree of anesthesia is based on maintaining the BIS 35 to 65.

Induction dose: 6 mg/kg/h with sufentanil Maintenance dose: 1~2 mg/kg/h with sufentanil If arousal occurs during surgery, rapidly increase the infusion rate of remimazolam to 12 mg/kg/h and infuse for 1 minute. If the patient's arousal persists after these measures, stop remimazolam infusion and replace with another drug.

The cardiac index (CI) at that time was measured and compared between the two groups.

The cardiac index (CI) at that time was measured and compared between the two groups.

The cardiac index (CI) at that time was measured and compared between the two groups.

The cardiac index (CI) at that time was measured and compared between the two groups.

total amount of norepinephrine during OPCAB

The incidence of hypotension during OPCAB are counted by number which based on the anesthetic record.