ALB and atrial fibrillation: From the perspective of RHR, compared to patients with RHR <80 bpm, patients with higher RHR (≥80 bpm) were younger, had less coronary heart disease, more AF, less previous percutaneous coronary intervention (PCI), and coronary artery bypass grafting (CABG), worse NYHA class, higher hemoglobin, and total bilirubin, lower albumin, lower indexed left ventricular end-diastolic dimension (LVEDDi) and left ventricular ejection fraction (LVEF), and increased use of beta-blockers and diuretics.