Fig. 2

The changes of systolic blood pressure (A) and heart rate (B) in the stable and unstable groups. DI; Dexmedetomidine infusion, DI-10; 10 min after initiation of DMED infusion, DI-20; 20 min after initiation of DMED infusion, DI-30; 30 min after DMED infusion, DI-45; 45 min after DMED infusion, DI-60; 60 min after DMED infusion, PACU; postanesthesia care unit, PA-10; 10 min after PACU admission, PA-20; 20 min after PACU admission, PA-30; 30 min after PACU admission, PA-40; 40 min after PACU admission. ^* When compared to baseline, the systolic blood pressure was significantly lower at 30 min after DMED infusion (p = 0.013), when infusion was stopped (p = 0.014), at admission to the PACU (p < 0.001), 10 (p < 0.001), 20 (p < 0.001), 30 (p < 0.001), and 40 (p < 0.001) minutes after PACU admission, and on discharge from PACU (p < 0.001), respectively, in the unstable group. ^† The systolic blood pressures were significantly different at 20 min after DMED infusion, 30 min after DMED infusion, at the PACU admission, 10 min after PACU admission, 20 min after PACU admission, 30 min after PACU admission, and 40 min after PACU admission between the two groups. (p = 0.017, p = 0.024, p = 0.037, p = 0.001, p < 0.001, p = 0.022, and p = 0.013, respectively). DMED; dexmedetomidine