Key result
HFpEF links to elevated respiratory muscle oxygen cost of breathing during submaximal exercise versus controls.
Why the study?
Patients with HFpEF have pulmonary system abnormalities leading to impaired ventilatory reserve and heightened respiratory muscle work during submaximal exercise.
Is respiratory muscle oxygen cost of breathing during submaximal exercise higher in patients with HFpEF compared to control patients?
Observational
Is respiratory muscle oxygen cost of breathing during submaximal exercise higher in patients with HFpEF compared to control patients?
p-value: p=< .03
Patients with HFpEF exhibit a significantly higher respiratory muscle oxygen cost of breathing during submaximal exercise compared to controls, highlighting a physiological contributor to exercise intolerance.
May contribute to exercise intolerance in HFpEF; leaves open whether targeting respiratory muscles improves outcomes.
BACKGROUND: Patients with heart failure with preserved ejection fraction (HFpEF) have pulmonary system abnormalities resulting in impaired ventilatory reserve and heightened respiratory muscle work during submaximal exercise. RESEARCH QUESTION: ) during submaximal exercise than control patients? STUDY DESIGN AND METHODS: was reported during exercise at 40 W and approximately 65% peak work rates. RESULTS: during exercise at 40 W and approximately 65% peak work rates (all P < .03). INTERPRETATION: is significantly elevated in patients with HFpEF compared with control patients during submaximal exercise.
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Phillips et al. (2026) conducted an observational in Heart failure with preserved ejection fraction (HFpEF). Heart failure with preserved ejection fraction vs. Control patients was evaluated on Respiratory muscle oxygen cost of breathing during submaximal exercise (p=< .03). Respiratory muscle oxygen cost of breathing is significantly elevated in patients with HFpEF compared with control patients during submaximal exercise (P < .03).
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