Analysis of N-terminal-pro-brain natriuretic peptide and C-reactive protein for risk stratification in stable and unstable coronary artery disease:: results from the AtheroGene study

Aims N-terminal-pro-brain natriuretic peptide (Nt-proBNP) is a reliable risk predictor in acute coronary artery disease (CAD). Little is known about patients with stable angina pectoris (SAP). We aimed to investigate the prognostic impact of Nt-proBNP in a population with CAD especially focussing on patients with SAP Methods and results We obtained baseline samples from a prospective cohort of 904 consecutive patients with CAD. Cardiovascular events were registered during followup.(median 2 years; maximum 3.7 years). Baseline Nt-proBNP was significantly higher among individuals with cardiovascular events compared with those without (711.5 vs. 238.8 pg/mL; P < 0.0001). A similar association was found if the analysis was performed in patients who presented with stable angina (330 vs. 166.5 pg/mL; P= 0.006) or acute coronary syndrome (990.9 vs. 527.7 pg/mL; P= 0.03). In the SAP group, patients within the top quartile (> 487.9 pg/mL) had a 3.7-fold (95% Cl 1.2-9.1; P= 0.01) increase in cardiovascular risk. After adjustment for most potential confounders including left ventricular ejection fraction, Nt-proBNP remained predictive for patients with serum concentrations in the upper quartile in comparison with patients in the lowest quartile (hazard ratio highest vs. lowest quartile: 4.0; P= 0.03) (n = 417). Conclusion Baseline concentration of Nt-proBNP is independently related to future cardiovascular events in patients with stable angina.