A univariate analysis demonstrated that the ratio of females, a high BNP level (>30.4 pg/mL), severe TR, and relapses of AF/AT during the CA were significantly higher in the recurrence group (P = .029, .006, .014 and .001 respectively), however, there was no significant difference in the other predictors between the two groups. Here, NPPB is linked to atrial fibrillation.