Relationship between 24-hour blood pressure rhythm and carotid scleratheroma in elderly patients with hypertension

Objeetive To investigate the relationship between 24-hour blood pressure rhythm and carotid scleratheroma in elderly patients with hypertension.Methods 193 elderly patients with hypertension were enrolled in the study and divided into study group (91 cases with carotid atherosclerosis) and control group (102 cases).All the patients were given 24h blood pressure rhythm examination.The characteristics of 24hour blood pressure rhythm was compared between the two groups.Results The 24h average systolic blood pressure(24h-SBP),24h average diastolic blood pressure (24h-DBP),24h average pulse pressure (24h-MBP) between the study group and the control group had no significant differences(P ＞ 0.05).The daytime average systolic blood pressure(d-SBP),diurnal mean diastolic blood pressure (d-DBP),diurnal average pulse pressure (d-MBP),nocturnal mean systolic blood pressure (n-SBP),nocturnal mean diastolic blood pressure(n-DBP),nocturnal mean pulse pressure(n-MBP) of the study group were significantly higher than those of the control group (t =16.92,24.68,6.16,12.87,11.59,6.35,all P ＜0.05).In study group,d-SBP,d-DBP,d-MBP were higher than n-SBP,n-DBP,n-MBP,the differences were statistically significant(F =73.61,P ＜ 0.01).The circadian blood pressure variability of the study group was more than 10％,the 24h ambulatory blood pressure curve graph of the study group was non-dipper curve.The circadian blood pressure variability of the control group was less than 5％,the 24h ambulatory blood pressure curve was dipper type curve.Conclusion The MBPS is strongly associated with carotid scleratheroma,and clinical treatment and study could derive from ABPM data analysis. Key words: Hypertension;  Periodicity;  Carotid artery diseases;  Aged