NPPB and atrial fibrillation: NT-proBNP was not different at admission (3966 [IQR 2311; 7087] ng/l versus 4040 [2087; 8638] ng) nor at discharge (2116 [1024; 4340] ng/l versus 2136 [813; 4925] ng) between patients with and without atrial fibrillation.