NPPB and heart failure: Multivariate analysis revealed three independent predictors of POAF: cardiac insufficiency (OR = 64.55, 95% CI: 2.41–1727.70), ventricular rate (OR = 1.17, 95% CI: 1.1–1.25), and elevated N-terminal pro-B-type natriuretic peptide (NT-proBNP, OR = 1.005, 95% CI: 1–1.009).