[Relationship between blood pressure variability and combined cardiovascular events in 5-10 years in hypertensive patients].

OBJECTIVE: To explore the relationship between blood pressure variability (BPV) and combined cardiovascular events in 5-10 years in patients with hypertension.
METHODS: A total of 367 hypertensive patients treated in our hospital from January, 2000 to January, 2005 were analyzed, and their BPV was assessed in comparison with 145 normotensive individuals. The hypertensive patients were classified into high BPV group and low BPV group, and the general clinical data and biochemical profiles were compared. The relationship between BPV and combined cardiovascular events of the patients within 5-10 years were explored.
RESULTS: Compared with the normotensive individuals, the hypertensive patients showed significantly increased standard deviation and coefficient of variation of 24-h systolic blood pressure (SBP), 24-h diastolic blood pressrue (DBP), daytime SBP, daytime DBP, night-time SBP and night-time DBP (P<0.01). The percentages of drinking, smoking, diabetes and coronary heart disease were significantly higher in patients with high BPV than those with lower BPV (P<0.01 or 0.05); uric acid, homocysteine, urinary protein/creatinine ratio and urinary microalbumin increased more significantly in patients with high BPV (P<0.01 or 0.05). In addition, the combined cardiovascular events in 5-10 years were significantly higher in the patients with higher BPV than those with lower BPV (P<0.01 or 0.05). Logistic multivariate logistic regression analysis showed that alcohol, diabetes, coronary heart disease, uric acid and homocysteine were independent risk factors for cardiovascular events in hypertensive patients (P<0.01 or 0.05).
CONCLUSION: In hypertensive patients, BPV is closely correlated with the long-term combined cardiovascular events, and a high BPV is associated with a greater likeliness of combined cardiovascular events.