NPPB and cardiomyopathy: There was also an improvement in quality of life, as assessed by Kansas City Cardiomyopathy Questionnaire (from 55.7 to 61.8; p = 0.038), and a trend towards a longer 6-min walked distance (from 318 m to 332 m; p = 0.065) and lower B-natriuretic peptide (from 643 to 535; p = 0.360).