[A clinical analysis of morning blood pressure surge in middle and old aged male hypertensive patients].

OBJECTIVE: To investigate the morning blood pressure surge (MBPS) and its relationship with 24-hour blood pressure variability and anti-hypertensive drugs in middle-aged and elderly hypertensive patients. METHODS: A total of 521 middle-age and elderly men were surveyed with ambulatory blood pressure monitoring and ambulatory electrocardiograms recordings as well as questionnaire investigation from January 2009 to December 2010. Subjects were divided into MBPS positive group and MBPS negative group according to the level of MBPS [> 35 mm Hg (1 mm Hg = 0.133 kPa) or ≤ 35 mm Hg]. RESULTS: In all the cases, the prevalence of MBPS was 19.4%, of which the elderly and very elderly had higher prevalences (18.9% and 21.8%, respectively) than the middle-aged (5.6%, both P < 0.01). Significant differences could be found in age[(81.6 ± 6.4) years vs (78.7 ± 9.7) years], day mean systolic blood pressure [(132.8 ± 13.3) mm Hg vs (128.8 ± 13.3) mm Hg], fasting blood glucose [(5.96 ± 1.59) mmol/L vs (5.68 ± 1.22) mmol/L] and 24-hour blood pressure variability between the two groups (all P < 0.05). Significant difference could be observed in the prevalence of MBPS between the diuretics-taking group and non-taking group (27.4% vs 17.6%, P < 0.05). CONCLUSIONS: The elderly hypertensive patients are prone to appear MBPS phenomenon. Fasting blood glucose level, 24-hour blood pressure variability may be associated with MBPS. Diuretic antihypertensive treatment may not be conductive for MBPS control.