Many studies have explored the predictors of arrhythmia recurrence, such as nonparoxysmal AF; female sex; longer AF duration prior to the catheter ablation; sleep apnea; obesity; older age; hypertension; structural heart disease; enlarged left atrial (LA) diameter and low left ventricular ejection fraction (LVEF); high CHADS2 [8], CHA2DS2-VASc [9], MB-LATER and APPLE scores [10]; high C-reactive protein [11]; low LA voltage [12]; increased LA fibrosis detected by cardiac magnetic resonance imaging [13]; and longer PV durability [14]. Here, CRP is linked to atrial fibrillation.