NPPB and ischemic stroke: We aimed to explore the potential role of N‐terminal pro‐B‐type natriuretic peptide (NT‐proBNP), d‐dimer, and the echocardiographic parameter left atrial diameter (LAD) in identifying and predicting the occurrence of ischemic stroke (IS) in patients with nonvalvular atrial fibrillation (NVAF).