|Heart Failure||Pulmonary Disease|
|Peak VO2||Reduced and might plateau||Reduced and does not plateau|
|Ventilatory threshold||Reduced||Normal or reduced; might not be attained|
|Breathing reserve, 1 – (peak VE/MVV)||>20%||<15%|
|Oxygen saturation||Normal||Often reduced >5%|
|VE/ VCO2 slope||Might be elevated||Often elevated|
|Post-exercise FEV1||Unchanged from rest||Might decrease compared with rest|
Reprinted, with permission, from Balady et al. (15).
FEV1 = forced expiratory volume in 1 s; MVV = maximum voluntary minute ventilation; VE = minute ventilation; VE/VCO2 = ventilatory equivalent of carbon dioxide; VO2 = oxygen uptake.