ArticleEuropean journal of applied physiology2025
Detection of exercise intensity thresholds in patients with chronic heart failure based on correlation properties of heart rate variability.
Article in European journal of applied physiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Reliability and validity of the respiratory threshold method.European journal of applied physiology · 2026Article
- Autonomic impairment in advanced heart-failure patients revealed by nonlinear heart rate variability measured during exercise.Scientific reports · 2026Article
- Non-invasive prediction of the first ventilatory threshold in Chinese patients with chronic heart failure for personalized exercise prescription.Frontiers in cardiovascular medicine · 2026Article
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8 authors.
Funding
Abstract
purposeThis study aimed to assess the agreement between ventilatory thresholds (VT1 and VT2), and heart rate variability (HRV) thresholds (HRVT1 and HRVT2) based on the alpha 1 index of detrended fluctuation analysis (DFA a1) in patients with chronic heart failure (CHF). Validating HRV-based thresholds could provide a cost-effective alternative for individualised exercise intensity prescription, improving safety and efficacy in exercise-based cardiac rehabilitation (CR) programmes.
methodsTwenty CHF patients (13 males, 7 females) performed a cardiopulmonary exercise test (CPET) on a cycle ergometer. Ventilatory thresholds were identified using a mixed method, while HRV thresholds were determined at DFA a1 values of 0.75 (HRVT1) and 0.5 (HRVT2). Threshold values for oxygen consumption (VO
resultsHRVT2 showed moderate-to-strong associations with VT2 for VO
conclusionIn CHF patients, HRVT2 appears to be a valid, practical surrogate for VT2 and may facilitate personalised intensity prescription where full CPET is unavailable. HRVT1 showed insufficient agreement with VT1 and should be used with caution. Larger cohorts and protocol refinements are warranted to confirm these observations and to explore strategies for improving HRVT1 accuracy.
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