Circulating secretoneurin concentrations predict 90-day mortality in patients with cardiogenic shock

Abstract Background Secretoneurin (SN) concentrations have been found to provide strong prognostic information in critically ill patients. Accordingly, in this study we hypothesized that SN would provide prognostic information in patients with cardiogenic shock. Objectives To evaluate the utility of SN concentrations to predict 90-day mortality in two multicenter, prospective clinical trials including patients with cardiogenic shock. Methods We measured SN concentrations with a CE-marked ELISA in patients with cardiogenic shock of all etiologies (Cohort #1, n=168) and in patients with post-myocardial infarction cardiogenic shock (Cohort #2, n=45). Inclusion criteria in both cohorts focused on systolic blood pressure <90 mmHg and evidence of tissue hypoperfusion, including increased lactate concentrations. We used Cohort #1 for primary analysis and Cohort #2 for validation. We assessed association between SN concentrations and mortality by Kaplan-Meier curves and by univariate and multivariable Cox proportional hazard regression analysis. Results Median age was 67 and 69 years (Cohort #1 and #2) and the patients were predominantly male (74% and 67%, respectively). Median SN concentration on study inclusion was 53 pmol/L in Cohort #1 and 50 pmol/L in Cohort #2, and SN concentrations decreased from study inclusion to 72 hours (p=0.03 for trend). 90-day mortality was 42% in Cohort #1 and patients with high SN concentrations had worse outcome (Figure A). Adjusting for variables that were associated with 90-day mortality in univariate analysis and not part of the inclusion selection, i.e., age, sex, comorbidities, blood pressure, estimated glomerular filtration rate, treatment, and N-terminal pro-B-type natriuretic peptide concentrations, SN concentrations on study inclusion were still associated with 90-day mortality: hazard ratio per 100 pmol/L increment 1.97 (1.29-3.01), p=0.002. 90-day mortality was 45% in Cohort #2 and SN concentrations were predictive of 90-day mortality also in Cohort #2 (Figure B). Conclusion SN concentrations provide incremental prognostic information to established risk indices in the early phase of cardiogenic shock.A. Cohort #1 with SN tertilesB. Cohort #2 divided by SN median