Figure 1: In our patient cohort of stable patients with dilated cardiomyopathy, reported functional NYHA class correlated well with functional testing. With increasing NYHA class, peak oxygen consumption (VO2max) and walking distance in the 6-minute walk test (6 MWT) progressively declined (a), whereas NT-proBNP levels increased (b). In contrast, sTWEAK levels significantly declined with increasing NYHA class (b). (Box-Whisker-Plots; ).