NPPB and atrial fibrillation: In contrast, NT-proBNP was not associated with AF recurrence for neither those with high nor low LA strain [NT-proBNP for those with low LA strain: OR = 1.01 (0.97–1.06), p = 0.66, and for high LA strain: 1.05 (0.97–1.13), p = 0.21, per 10% increase in NT-proBNP].