ALB and atrial fibrillation: There were no statistically significant differences between the groups in terms of gender, age, New York Heart Association (NYHA) classification, coronary heart disease, atrial fibrillation, hyperlipidemia, myocardial infarction, chronic pulmonary disease, preoperative neutrophil percentage, preoperative hemoglobin, preoperative platelet count, preoperative total bilirubin, preoperative albumin, preoperative left ventricular end-diastolic diameter, and preoperative creatinine levels (P > 0.05).