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N-terminal pro–B type natriuretic peptide (NT-proBNP) levels trended over time by atrial fibrillation (Afib) status for patients with heart failure with reduced ejection fraction in the Guiding Evidence-Based Therapy Using Biomarker-Intensified Treatment in Heart Failure (GUIDE-IT) trial. Data are trended at 0, 3, 6, 12, and 24 months.
