Figure 2
From: Oxygen kinetics during 6-minute walk tests in patients with cardiovascular and pulmonary disease
Pre-processing of oxygen uptake during 6MWT and curve fitting. Panel A shows the raw breath-by-breath data. Panel B displays the data after averaging over successive periods of 18Â seconds. Panel C depicts the curve fitting (red line) during the 6-minute walk test (6MWT), together with the parameter estimates including the lower limit (y1), the upper limit (y2), and the oxygen deficit (O2def), from which the mean response time is derived.