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- W4387004472 abstract "Heart failure with preserved ejection fraction (HFpEF) patients have an increased ventilatory demand. Whether their ventilatory capacity can meet this increased demand is unknown, especially in those with obesity. Body composition (DXA) and pulmonary function were measured in 20 patients with HFpEF (69±6 yr;9 M/11 W). Cardiorespiratory responses, breathing mechanics, and ratings of perceived breathlessness (RPB, 0-10) were measured at rest, 20 W, and peak exercise. FVC correlated with %body fat (R2=0.51,P=0.0006), V̇O2peak (%predicted,R2=0.32,P=0.001), and RPB (R2=0.58,P=0.0004). %Body fat correlated with end-expiratory lung volume at rest (R2=0.76,P<0.001), 20 W (R2=0.72,P<0.001), and peak exercise (R2=0.74,P<0.001). Patients were then divided into two groups: those with lower ventilatory reserve (FVC<3 L,2 M/10 W) and those with higher ventilatory reserve (FVC>3.8 L,7 M/1 W). V̇O2peak was ∼22% less (p<0.05) and RPB was twice as high at 20 W (p<0.01) in patients with lower ventilatory reserve. Ventilatory reserves are limited in patients with HFpEF and obesity; indeed, the margin between ventilatory demand and capacity is so narrow that exercise capacity could be ventilatory limited in many patients." @default.
- W4387004472 created "2023-09-26" @default.
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- W4387004472 date "2023-12-01" @default.
- W4387004472 modified "2023-10-15" @default.
- W4387004472 title "Ventilatory Limitations in Patients with HFpEF and Obesity" @default.
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- W4387004472 doi "https://doi.org/10.1016/j.resp.2023.104167" @default.
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