Primary endpoint	Change from baseline in 6‐min walk test distance at week 12
Key secondary endpoints	Change from baseline in Kansas City Cardiomyopathy Questionnaire total symptom score at week 12 Change from baseline in Chronic Heart Failure Questionnaire Self‐Administered Standardized format dyspnoea score at week 12
Other secondary endpoints	Week 6 Change from baseline in 6MWT distance at week 6 Week 12 Change from baseline in Clinical Congestion Score at week 12 Change from baseline in Patient Global Impression of Severity of heart failure symptoms at week 12 Change from baseline in Patient Global Impression of Severity of dyspnoea at week 12 Patient Global Impression of Change in heart failure symptoms at week 12 Patient Global Impression of Change in dyspnoea at week 12 Change from baseline in N‐terminal pro‐brain natriuretic peptide at week 12