Figure 2. Prevalence of unexpectedly low BNP concentrations.
BNP levels below 50 pg/ml (represented by green shading) and BNP levels below 100 pg/ml (represented by combination of green and orange shading) are presented for patients with hospitalized HF, abnormal echocardiograms, and abnormal hemodynamics, respectively. BNP, B-type natriuretic peptide; HF, heart failure; Echo, echocardiogram.