NPPB and Schnyder corneal dystrophy: Although the group of deceased ACHD patients and SCD survivors had higher NT-proBNP levels (333 pg/ml (IQR 90–2492) vs. 135 pg/ml (IQR 54–316)) and decreased EF (48.0 ± 12.4% vs. 58.9 ± 8.11%), these differences were not statistically significant (Table 5).