NPPB and atrial fibrillation: In the multivariate analysis, the serum BNP level (HR = 1.003 95%CI = 1.000–1.005, P = 0.02), VERAF (HR = 2.483, 95% CI = 1.121–5.502, P = 0.03), ERAF-1M (HR = 2.486, 95% CI = 1.165–5.305, P = 0.02) and ERAF-3M (HR = 5.554, 95% CI = 2.652–11.628, P<0.001) were associated with true AF recurrence (Table 6).