Cardiopulmonary Interactions in Patients With Heart Failure

Inclusion criteria * Written informed consent prior to initiation of any study-mandated procedures * Male or female ≥40 years at screening * Confirmed diagnosis of HFpEF (Heart failure with preserved ejection fraction), HFmrEF (heart failure with mid range ejection fraction) or HFrEF (Heart failure with reduced ejection fraction) in New York Heart Association (NYHA) Functional Class II, III or IV Exclusion criteria * Significant lung disease according to the judgment of the investigator; as a rule, the total lung capacity (TLC) should be \>70% of the predicted value and the forced expiratory volume in 1 second (FEV1) should be \>60% of the predicted value * Significant co-morbidities expected to limit life expectancy to less than 2 years, according to the judgment of the investigator