Abstract 18200: Prognostic Importance of Serial NT-proBNP Measurements Following High-Risk Mi: The PARADISE-MI Trial

Abstract

Introduction: N-terminal pro-B-type natriuretic peptide (NT-proBNP) is a potent predictor of heart failure (HF) and death following myocardial infarction (MI). NT-proBNP levels change post MI. Hypothesis: Serial measurements of NT-proBNP add prognostic information. Aims: To investigate the prognostic importance of NT-proBNP two weeks after MI in PARADISE-MI and to identify predictors of week 2 NT-proBNP. Methods: Patients with MI and LVEF ≤40% and/or pulmonary congestion (n=5661) were randomized to sacubitril/valsartan or ramipril. Patients with NT-proBNP measured at week 2 (n=1057) were analyzed. Associations of week 2 NT-proBNP with subsequent clinical outcomes were evaluated with Cox models adjusted for baseline NT-proBNP, age, sex, atrial fibrillation (AF), LVEF, STEMI presentation, BMI, eGFR, high-sensitivity troponin T (hs-cTnT), time from presentation to randomization and treatment assignment. Results: Median NT-proBNP was 1425 [685, 2598] ng/L at week 2, declining 23% (95% CI, 20-26%) from baseline. Patients in the highest NT-proBNP quartile at week 2 (≥2616 ng/L) were older, had lower LVEF and eGFR, higher Killip class, more AF, and higher baseline NT-proBNP (all p≤0.05). Higher NT-proBNP at week 2 was independently associated with greater risk of CV death or incident HF (adjusted HR [aHR] 1.62 per log2; 95% CI, 1.30-2.03), HF hospitalization (aHR 1.96; 95% CI, 1.46-2.62) and all-cause death (aHR 1.86; 95% CI, 1.40-2.47). Higher baseline NT-proBNP and hs-cTnT, longer interval between presentation and randomization and female sex were associated with higher week 2 NT-proBNP levels while sacubitril/valsartan was associated with lower levels (Table). Conclusions: Patients with elevated NT-proBNP two weeks after high-risk MI are at greater risk of subsequent death or incident HF, even after adjusting for baseline level. Higher baseline NT-proBNP and hs-cTnT are predictive of higher week 2 NT-proBNP while sacubitril/valsartan decreases levels.