Objective: To study the association of N-terminal pro-brain natriuretic peptide (NT-proBNP) with several brain MRI markers of brain vascular disease in a sample of participants free of stroke and dementia.
Methods: NT-proBNP plasma level was determined by means of a sandwich immunoassay method in a cohort study comprising 278 hypertensive patients. The presence of silent brain infarcts, brain microbleeds, enlarged perivascular spaces, and white matter hyperintensity volumes was assessed by brain MRI. We performed univariate and multivariate analyses to determine whether NT-proBNP was independently associated with these imaging markers, individually or combined.
Results: Median age was 63 years, and 41.4% were women. NT-proBNP remained independently associated with silent brain infarcts (odds ratio [OR] per 1-SD increase in NT-proBNP 2.11, 95% confidence interval [CI] 1.44-3.10), brain microbleeds (OR 1.79, 95% CI 1.15-2.78), basal ganglia enlarged perivascular spaces (OR 1.55, 95% CI 1.12-2.15), and white matter hyperintensity volumes (β 1.60, 95% CI 0.47-2.74), even after controlling for vascular risk factors, cardiovascular risk, atrial fibrillation, previous heart disease, duration of hypertension, and preventive treatments. A score combining several imaging markers was also related to NT-proBNP levels (common OR per 1-SD increase 1.74, 95% CI 1.21-2.50).
Conclusions: NT-proBNP is independently associated with silent cerebrovascular lesions and could be a surrogate marker of vascular brain damage in hypertension.
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