Although HR of the three groups decreased mildly following induction,there were no any changes in CI,SI,PTRI,PVRI,PORI,SVRI,LVSWI and RVSWI(P>0.05).

• 诱导过程平稳 ；诱导后三组的 HR均略减慢 ；但 CI、SI、PTRI、PVRI、PORI、SVRI、L VSWI及 RVSWI等无显著性改变 ( P>0 .；0 5 )。 气管插管后三组的 HR均回升；但仍略低于麻醉前 ;