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. 2019 Feb 21;316(5):R512–R524. doi: 10.1152/ajpregu.00345.2018

Fig. 6.

Fig. 6.

Leg O2 delivery and leg O2 consumption responses. A: absolute values for leg O2 delivery (top) and leg O2 consumption (bottom) in control subjects and heart failure patients with reduced ejection fraction (HFrEF) at rest and during knee-extensor exercise in control conditions (preinfusion) and during phentolamine infusion. B: phentolamine-induced changes (Δ) in leg O2 delivery (top) and leg O2 consumption (bottom) in control subjects and patients with HFrEF at rest and during knee-extensor exercise. *P < 0.05 vs. control; #P < 0.05 vs. preinfusion; †P < 0.05 vs. rest.