Cardiopulmonary exercise test and 6-minute walking test are frequently used tools to evaluate physical performance in heart failure (HF), but they do neither represent activities of daily living (ADLs) nor fully reproduce patients' symptoms. We assessed differences in task oxygen uptake, both as absolute value and as percentage of peak oxygen consumption (peakVO2), ventilation efficiency (VE/VCO2 ratio), and dyspnea intensity (Borg scale) in HF and healthy subjects during standard ADLs and other common physical actions.
Mapelli M, Salvioni E, Bonomi A, Gugliandolo P, De Martino F, Vignati C, Berna G, Agostoni P. How Patients With Heart Failure Perform Daily Life Activities: An Innate Energy-Saving Strategy. Circ Heart Fail 2020 Nov;13(11):e007503. doi: 10.1161/CIRCHEARTFAILURE.120.007503.