NPPB and atrial fibrillation: NT-proBNP levels were different between no AF and hAF [64.28 pg/ml (IQR 37.08–133.10) vs. 128.3 pg/ml (IQR 97.69–191.3), p = 0.031; Figure 2C] while other biomarkers did not show differences (Supplementary Figures 1, 2).