NPPB and acute kidney injury: Of those, 66 patients (30.9%) have AKI after surgical CVS, and patients with AKI were older and had higher levels of CPB time, uric acid, and N-terminal pro-brain natriuretic peptide (NT−proBNP), PASP, IVST, and LVPW and lower levels of eGFR and LVEF than patients without AKI.