CRP and atrial fibrillation: As a result of these studies, serum uric acid-to-creatinine ratio [49], uric acid-to-albumin ratio [15], monocyte-to-HDL-C ratio [16], CRP-to-albumin ratio [12], and neutrophil-to-lymphocyte ratio [17] have all been associated with the recurrence of AF after catheter ablation.