In this study, high ARV of daytime systolic BP resulted in an independent predictor of cardiovascular risk in hypertensive patients, while high s.d. did not. Our data suggest that, in comparison to s.d., ARV could be a more appropriate index of BP variability and a more useful predictor of outcomes.
Increased BP variability is associated with higher incidence of cardiovascular events, but also with other relevant prognostic factors. Indeed, in multivariate analysis the possible adverse prognostic impact of BP variability is no longer evident. Thus, in treated hypertension, BP variability evaluated by noninvasive monitoring is not an independent predictor of outcome.
This study shows that, among treated hypertensive patients receiving double therapy with uncontrolled clinic blood pressure those with true nonresponder hypertension are at higher cardiovascular risk. Ambulatory blood pressure monitoring should be performed in this population to achieve a better prognostic stratification.
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