Impact of in-hospital blood pressure variability on cardiovascular outcomes in patients with acute coronary syndrome.

Abstract

To evaluate the impact of blood pressure variability (BPV) on cardiovascular outcomes in patients with acute coronary syndrome, short-term BPV was estimated by using weighted standard deviation of 24-hour ambulatory blood pressure monitoring readings. The primary outcome was in-hospital major adverse cardiac events (MACE). Overall, 200 patients (mean age, 58.6years; 27.5% women; 38% with diabetes mellitus; and 47% smokers) were divided into low and high BPV groups based on the median value (9.45). Patients in the high BPV group were more likely to have in-hospital MACE compared with patients with low BPV (47% vs 27%, P=.003). Multivariate binary logistic regression analysis of incidence of MACE showed that BPV (odds ratio, 2.4; confidence interval, 1.2-4.5 [P=.008]) and presence of type II diabetes mellitus (odds ratio, 2.6; confidence interval, 1.2-5.3 [P=.008]) were the only independent predictors of in-hospital MACE derived mainly by hypertensive emergencies. BPV could be an important risk factor for in-hospital MACE in patients with acute coronary syndrome.