Click on image to view larger version.

Figure 2 The percentage of patients who had at least a 60-s increase from baseline in exercise duration and the percentage of patients with at least a 1.25 ml/kg/min from baseline at 6 months after treatment (co-primary end points; intent-to-treat analysis, last observation carried forward). VO₂ = oxygen uptake. Solid bar = enhanced external counterpulsation; open bar = control subjects.