When analyzing data with respect to preoperative chronic heart failure, it was demonstrated that patients with diagnosed heart failure exhibited significantly higher baseline levels of NTproBNP (435 [IQR: 711.15] pg/mL, p < 0.001), as well as at 24 h (482.3 [IQR: 1067.6] pg/mL, p = 0.002) and 48 h (346 [IQR: 1180.2] pg/mL, p = 0.006) postoperatively, compared to patients without diagnosed heart failure (Table 4). Here, NPPB is linked to heart failure.