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Cardiogenic shock (CS) remains the leading cause of death in patients hospitalized for myocardial infarction (MI). Systemic inflammation with inappropriate vasodilatation is observed in many patients with CS and may contribute to an excess mortality rate. The purpose of this study was to determine the predictive role of serial measurements of Nt-proBNP, interleukin-6 (IL-6), and procalcitonin (PCT) for 30-day mortality in patients with CS due to MI.    Methods  The present study is a prospective single-center study including 87 patients with MI complicated by CS treated with acute revascularization and intraaortic balloon counterpulsation (IABP) support. Predictive values of plasma levels at admission (T 0 ), after 24 hours (T 1 ), and after 72 hours (T 2 ) were examined according to 30-day mortality.    Results  Significant differences between survivors ( n  = 59) and nonsurvivors ( n  = 28) were seen for Nt-proBNP at T 0 , for IL-6 at T 0  and T 1 , and for PCT at T 1  and T 2 . According to ROC analyses, the highest accuracy predicting 30-day mortality was seen at T 0  for IL-6, at T 1  for PCT, and at T 2  for PCT. In univariate analysis, significant values were found for Nt-proBNP at T 1 , and for IL-6 and PCT at all points in time. Within the multivariate analysis, age, creatinine, and IL-6 were significant determinants of 30-day mortality, in which IL-6 showed the highest level of significance.    Conclusions  In patients with MI complicated by CS, IL-6 represented a reliable independent early prognostic marker of 30-day mortality. PCT revealed a significant value at later points in time, whereas Nt-proBNP seemed to be of lower relevance.

Interleukin-6 is the strongest predictor of 30-day mortality in patients with cardiogenic shock due to myocardial infarction