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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: JACC Heart Fail. 2018 Mar 7;6(4):329–339. doi: 10.1016/j.jchf.2018.01.007

Figure 4. Prolonged VO2 recovery delay is associated with reduced VO2/work slope.

Figure 4

A) Oxygen uptake plotted against workload during progression of an exercise test in a representative patient with HF and a prolonged VO2RD of 26s. The red area highlights the difference between normal VO2/work (10 ml/min/watt) and the subject’s reduced VO2/work of 7.6 ml/min/watt, which represents an O2 deficit at the tissue. B) A scatter plot of VO2/work versus VO2RD for the combined HF group (n=50). Spearman rank correlation is included. The HF patients with prolonged VO2RD and abnormal VO2/work (< 8.5 mL/watt) are denoted in red (n=20 of 25 with prolonged VO2RD)