NPPB and acute kidney injury: For all included patients, the postoperative 30-day mortality was 1.69% (55 patients), 21.24% (690 patients) presented prolonged mechanical ventilation, 13.30% (432 patients) had an extended ICU stay, 16.13% (524 patients) had a prolonged hospital stay, 14.47% (470 patients) presented with a BNP level >400 pg/ml, 21.18% (688 patients) presented with a cTnI level >5.4 ng/ml, 23.76% (772 patients) presented with hepatic insufficiency, and 17.57% (571 patients) presented with postoperative AKI.