Significance of masked and nocturnal hypertension in normotensive women coursing a high risk pregnancy
Objective: The aim was to evaluate the prevalence of nocturnal and masked hypertension and the prognostic values of these blood pressure (BP) abnormalities in normotensive women coursing a high risk pregnancy. Methods: The study was performed in pregnant women with 20 or more weeks of gestation coursing a high risk pregnancy, sent to a specialized hypertension department to perform a prospective defined protocol of BP evaluation. Women with office BP at least 140/90 mmHg were excluded. An ambulatory monitoring of BP was performed to identify masked and nocturnal hypertension (defined according to the current guidelines) The adjusted risk for development of preeclampsia/eclampsia (PEEC) was estimated using logistic regression. The ability of SBP and DBP to identify risk of PEEC was estimated using area under the receiver operating characteristic curves. Results: Eighty seven women (29 7 years old, 30 5 weeks of pregnancy) were included in this analysis. The prevalence of masked hypertension was 33.3% Nocturnal hypertension was found in 42.5% of the women. Remarkably, 27.0% of the women with nocturnal hypertension had normal 24 h values according to ambulatory BP monitoring. Twenty two patients developed PEEC; adjusted relative risks increased with the presence of nocturnal (odds ratio 4.72, 95% confidence interval 1.25 19.43, P 0.023) or masked hypertension (odds ratio 7.81, 95% confidence interval 2.6 22.86, P 0.001) Nocturnal SBP and DBP had the highest abilities to predict PEEC (area under the curve 0.77 and 0.80, respectively) Conclusion: Masked and nocturnal hypertension are frequent findings in normotensive women coursing a high risk pregnancy, and their presence implies an increased risk to develop PEEC.
Journal of hypertension