NPPB and congestive heart failure: In a multivariate linear regression model, we analyzed the impact of sex, age, BMI, CHF severity, baseline values of NT-proBNP, KCCQ overall score, exercise capacity (Wmax), number of comorbidities, the left ventricular ejection fraction by category (normal, slightly -, moderately-, severely restricted), and the number of completed videos at the start of intervention (first four weeks) on the change in completed exercise videos (V12 minus V0).