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Background  N‐terminal pro‐B‐type natriuretic peptide (NT‐proBNP), a commonly used clinical marker of cardiac function, is associated with the presence of stroke symptoms and is a strong risk factor for future atrial fibrillation, stroke, and all‐cause mortality. Few data are available on the association between NT‐proBNP levels and stroke recurrence.    Objective  We studied the relationship between NT‐proBNP and risk of future ischemic stroke across the continuum of preexisting cerebrovascular conditions: asymptomatic, prior stroke symptoms, prior transient ischemic attack (TIA), and prior stroke.    Methods  The Reasons for Geographic and Racial Differences in Stroke (REGARDS) cohort enrolled 30,239 black and white Americans aged 45 years and older from 2003 to 2007. With 5.4 years follow‐up, baseline NT‐proBNP was measured in 892 participants who developed ischemic stroke and a 4328‐person cohort random sample. Hazard ratios of stroke by baseline NT‐proBNP were calculated in groups based on the presence of prebaseline cerebrovascular conditions.    Results  In the fully adjusted model, elevated NT‐proBNP was associated with stroke risk in participants without a preexisting cerebrovascular condition (hazard ratio [HR], 2.32; 95% confidence interval [CI], 1.84‐2.94) and in participants with a history of stroke symptoms (HR, 1.67; 95% CI, 1.01‐2.78) or transient ischemic attack (HR, 2.66; 95% CI, 1.00‐7.04) but not among those with prior stroke (HR, 1.26; 95% CI, 0.71‐2.21).    Conclusions  These findings support the potential for NT‐proBNP testing to identify people who are at highest risk for future stroke.

research and practice in thrombosis and haemostasis

N‐Terminal pro‐B‐type natriuretic peptide and stroke risk across a spectrum of cerebrovascular disease: The REasons for Geographic and Racial Differences in Stroke cohort