| Background Hypertension is an important risk factor for cognitive impairment.This study explored whether elderly patients with stage I hypertension(HPs)and normotensive patients(NPs)showed differences in the recovery of postoperative attention network function,according to attentional network test(ANT)performance.Methods Of 110 patients screened,25 HPs and 25 NPs completed this study.The MiniMental State Examination were applied to all participants before the operation and the ANT(on day 2 and 7)after the operation.All participants completed 1 day preoperatively and the ANT on postoperative days(PODs)2 and 7.Results Compared with NPs,HPs had significantly lower alerting network effect scores and more difficulty resolving conflict on PODs 7.However,no significant difference was observed between groups on PODs 2.Orienting network performance was similar between groups at all timepoints.Significant differences in alerting and executive control network performances were observed between PODs 2 and 7 within each group.Conclusions HPs showed selective cognitive impairment at different time points following elective hip or knee arthroplasty.Compared with NPs,HPs were more likely to experience delayed recovery of alerting and executive control network function,but not orienting network function,during the first postoperative week. |
