NPPB and congestive heart failure: Natriuretic peptides such as B-type natriuretic peptide (BNP) have been shown to have diagnostic and predictive value for CHF3, and left ventricular ejection fraction (EF) is the most commonly used prognostic indicator for CHF.4 However, for stable CHF patients, repeated monitoring of BNP and echocardiography require considerable medical resources and increases the burden on society and the patients’ families.5