In the 90 days following catheter ablation for atrial fibrillation, patients who were readmitted were more likely to be female (95% CI 1.037-1.376, p-value: 0.014), have heart failure (95% CI 1.25-1.789, p-value < 0.05), chronic kidney disease (95% CI 1.028-1.605, p-value: 0.027), be on HMG CoA reductase inhibitors (95% CI 1.069-1.499, p-value: 0.005), and on coronary vasodilators (95% CI 1.001-1.914, p-value: 0.049). This evidence concerns the gene HMGCR and chronic kidney disease.