NPPB and atrial fibrillation: In subgroup analysis, age (HR 1.30, 95% CI 1.02-1.65, <i>p</i> = 0.030) and LA reservoir strain (HR 0.63, 95% CI 0.44-0.90, <i>p</i> = 0.011) were independent predictors of AF in patients with clinically silent CS, whereas baseline NT-proBNP (HR 1.003, 95% CI 1.001-1.006, <i>p</i> = 0.017) predicted AF in patients with clinically manifest CS.