Figure 1.

Box plot of N‐terminal pro‐B‐type natriuretic peptide (NT‐proBNP) concentrations in 31 cats with a first‐time episode of congestive heart failure secondary to cardiomyopathy. Concentrations of NT‐proBNP were measured at 3 time points in all cats: Within 4 hours of admission to the hospital (admission), at the time of discharge from the initial hospitalization (discharge), and at the re‐evaluation 7–10 days later (re‐evaluation). For each plot, the box represents the central 50% of the values. The horizontal line within the box represents the median NT‐proBNP concentration, and the bars indicate the range. Median NT‐proBNP concentrations decreased significantly over the course of the 3 time points (P < .012), with significant changes from admission to discharge (P = .005) and from admission to re‐evaluation (P = .024), but not from discharge to re‐evaluation (P = .58).