Clinical Usefulness of Response Profiles to Rapidly Incremental Cardiopulmonary Exercise Testing
Figure 12
Change in heart rate oxygen uptake (arrow) slope (arrow) during incremental CPET in a patient with severe cardiovascular limitation to exercise (panel (a)). Note that this led to a plateau in pulse ( ratio) as the -intercept becomes zero; that is, the relationship passes through its origin (panel (b)). Unl is unloaded pedaling.