Objective To explore the role of parecoxib in protection of learning and memory ablility in rats with global cerebral ischemia/reperfusion injury. Methods Male Wistar rats were randomly divided into a sham group (S group), a ischemia/reperfusion group (I/R group), and a ischemia/reperfusion with parecoxib group (I/R+PA group). Global cerebral ischemia was induced by Pulsinelli 4-vessel occlusion. 72 h after reperfusion, Morris water maze was used to assess spatial learning and memory ability for consecutive five days. The histological changes in the hippocampus were detected by Nissl staining. Results As compared with the I/R group, rats in S guoup and I/R+PA group had a significantly shortened escape latency (P<0.05), and had significantly longer dwelling time in the former platform quadrant and more frequent cross-platform movement in the Morris water maze test. Conclusions Parecoxib plays a role in protection of learning and memory ability in rats with global cerebral ischemia/reperfusion injury.

Objective: To explore the effect of persistent atrial ifbrillation (AF) on circadian rhythm of blood pressure (BP) in patients with essential hypertension (EH).
Methods: A total of 173 EH patients treated in Gansu Provincial Hospital from 2013-02 to 2014-01were studied. The patients were divided into 2 groups: EH group,n=88 and Persistent AF combining EH group,n=85. The baseline information was studied and the risk factors of persistent AF combining EH were investigated by multivariate logistic regression analysis.
Results: Compared with EH group, the Persistent AF combining EH group showed decreased average daytime DBP, minimum daytime SBP, minimum daytime DBP and the average 24-hour DBP, while increased maximum nighttime SBP and the percentage of reverse dipper in DBP, allP<0.05. There were no significant differences for the average of daytime SBP, maximum daytime SBP, maximum daytime DBP, the average 24-hour SBP, average nighttime SBP, average nighttime DBP, maximum nighttime DBP, minimum nighttime SBP, minimum nighttime DBP and the percentage of reverse dipper in SBP between 2 groups, allP>0.05. Multivariate logistic regression analysis indicated that the maximum nighttime SBP was obviously related to persistent AF combining EH (OR=1.038, 95 CI 1.014-1.062,P=0.001).
Conclusion: Persistent AF may incur daytime BP dropping, such change was not obviously observed for nighttime BP in EH patients.