In ROC analysis, NT-proBNP showed good predictive ability in terms of predicting both the outcome of AF cardioversion at baseline and the risk of AF recurrence/persistence at D8 (D0: AUC 0.735, p < 0.001, Figure 1; D8: AUC 0.761, p < 0.001, Figure 2). Here, NPPB is linked to atrial fibrillation.