SummaryInflammatory biomarkers have been proposed for use in the risk stratification of patients with acute myocardial infarction (AMI). We examined the value of inflammatory biomarkers over clinical features for predicting cardiovascular (CV) events in stable outpatients with MI. We enrolled 430 post-MI patients and measured their levels of high-sensitivity C reactive protein (hs-CRP), growth differentiation factor-15 (GDF-15), and the interleukin-1 receptor family member called ST2 (ST2), one month after AMI. Patients were prospectively followed for 3 years. In our study cohort (mean age, 66 ± 12 years; left ventricular ejection fraction, 55 ± 13%), CV events were observed in 39 patients (9.1%). KaplanMeier analysis revealed that patients with high levels of GDF-15 (≥ 1221.0 ng/L) showed poorer prognoses than those with low levels of GDF-15 (< 1221.0 ng/L) (20.4% versus 3.6%, P < 0.001); hs-CRP and ST2 did not show a similar correlation with prognoses. GDF-15 remained associated with CV events after adjusting for age, chronic kidney disease, and B-type natriuretic peptide (hazard ratio, 1.001; 95% confidence interval, 1.000 -1.001; P = 0.046). GDF-15 provided an incremental predictive value for CV events over clinical features (incremental value in global χ 2 = 43.81, P < 0.001). In outpatients with prior MI, GDF-15 was an independent indicator of CV events, unlike hs-CRP and ST2. GDF-15 provided an incremental prognostic value over clinical features. (Int Heart J 2016; 57: 11-17) Key words: Coronary artery disease, Growth differentiation factor-15, Prognosis I nflammatory biomarkers have been proposed for use in the risk stratification of patients with cardiovascular (CV) disease. 1-7) Patients with acute myocardial infarction (AMI) are at significant risk for recurrent CV events, such as death, recurrent MI, and heart failure. Novel biomarkers for patients with AMI are of interest because they may reveal pivotal disease mechanisms and potential therapeutic targets.
8)High-sensitivity C reactive protein (hs-CRP); growth differentiation factor-15 (GDF-15), a member of the transforming growth factor-β superfamily; and ST2, a member of the interleukin-1 receptor family, are strongly associated with CV events in AMI patients. [9][10][11][12][13][14][15][16] In clinically stable patients with acute decompensated heart failure, high levels of B-type natriuretic peptide (BNP) at the end of a hospitalization are strong, independent markers of CV events compared with levels during the acute phase.17) Secondary prevention of CV events is a crucial factor for the prognostic improvement in patients with AMI, and novel biomarkers provide important information about patient management if the biomarkers contribute to the risk stratification in these patients. However, the prognostic significance of inflammatory biomarkers for risk stratification in stable post-MI outpatients is poorly understood.
Editorial p.1The aims of this study were to 1) compare the prognostic significance of inflammatory biomarkers for predicting C...