Key result
Exertional symptoms in HF correlate with peak VO2 but underestimate severe disability ~45% of the time.
Why the study?
Most clinicians rely on exertional symptoms to assess functional capacity in heart failure, but it remains uncertain whether these subjective symptoms reliably reflect functional capacity over time.
Does the subjective reporting of exertional symptoms reliably reflect functional capacity measured by peak VO2 in patients with heart failure?
Comparison
Exertional fatigue and dyspnea symptom scores vs cardiopulmonary exercise testing
Design
Prospective longitudinal observational study
Follow-up
One to four years
Authors
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Symptoms may underestimate functional disability in HF; leaves open whether CPET should guide management over symptom reports.
Observational (n=50)
Does the subjective reporting of exertional symptoms reliably reflect functional capacity measured by peak VO2 in patients with heart failure?
Effect estimate: r = 0.47
p-value: p=<0.01
Exertional symptoms frequently underestimate the severity of functional disability in heart failure, suggesting cardiopulmonary exercise testing is more reliable for assessing functional capacity.
Wilson et al. (1999) conducted an observational in heart failure (n=50). Exertional symptoms was evaluated on Correlation between composite symptom scores and peak exercise minute oxygen consumption (VO2) (r = 0.47, p=<0.01). Exertional symptoms in heart failure correlated with peak VO2 (r=0.47, p<0.01) but underestimated severe functional disability 45% of the time.
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