However, the predictive power of this biomarker of heart failure (expressed as Logistic Regression for mortality) was found to be of borderline significance and, surprisingly, less effective if compared to EO (Logistic Regression for NT-proBNP: p = 0.085 and p = 0.052 for preoperative and postoperative NT-proBNP values, resp). Here, NPPB is linked to heart failure.