The SHAP analysis identified age, albumin, neutrophil-to-lymphocyte ratio (NLR), blood glucose, international normalized ratio (INR), pulse rate, mean corpuscular hemoglobin concentration (MCHC), serum creatinine, estimated glomerular filtration rate (eGFR), and diastolic blood pressure as key predictors of postoperative heart failure. Here, ALB is linked to heart failure.