The self-perception of dyspnoea threshold during the 6-min walk test: a good alternative to estimate the ventilatory threshold in chronic obstructive pulmonary disease
| Autor: | Emilie Tremey, Alain Varray, A. Couillard, Christian Préfaut, Nelly Héraud |
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| Rok vydání: | 2016 |
| Předmět: |
Male
medicine.medical_specialty Coefficient of variation Pulmonary disease Physical Therapy Sports Therapy and Rehabilitation Walk Test 6 min walk 03 medical and health sciences Diagnostic Self Evaluation Pulmonary Disease Chronic Obstructive 0302 clinical medicine Heart Rate Internal medicine Forced Expiratory Volume Heart rate medicine Humans Reproducibility business.industry Rehabilitation Reproducibility of Results 030229 sport sciences Middle Aged Dyspnea 030228 respiratory system Walk test Cardiology Physical therapy Breathing Feasibility Studies Female Ventilatory threshold business Respiratory Insufficiency |
| Zdroj: | International journal of rehabilitation research. Internationale Zeitschrift fur Rehabilitationsforschung. Revue internationale de recherches de readaptation. 39(4) |
| ISSN: | 1473-5660 |
| Popis: | To determine and/or adjust exercise training intensity for patients when the cardiopulmonary exercise test is not accessible, the determination of dyspnoea threshold (defined as the onset of self-perceived breathing discomfort) during the 6-min walk test (6MWT) could be a good alternative. The aim of this study was to evaluate the feasibility and reproducibility of self-perceived dyspnoea threshold and to determine whether a useful equation to estimate ventilatory threshold from self-perceived dyspnoea threshold could be derived. A total of 82 patients were included and performed two 6MWTs, during which they raised a hand to signal self-perceived dyspnoea threshold. The reproducibility in terms of heart rate (HR) was analysed. On a subsample of patients (n=27), a stepwise regression analysis was carried out to obtain a predictive equation of HR at ventilatory threshold measured during a cardiopulmonary exercise test estimated from HR at self-perceived dyspnoea threshold, age and forced expiratory volume in 1 s. Overall, 80% of patients could identify self-perceived dyspnoea threshold during the 6MWT. Self-perceived dyspnoea threshold was reproducibly expressed in HR (coefficient of variation=2.8%). A stepwise regression analysis enabled estimation of HR at ventilatory threshold from HR at self-perceived dyspnoea threshold, age and forced expiratory volume in 1 s (adjusted r=0.79, r=0.63, and relative standard deviation=9.8 bpm). This study shows that a majority of patients with chronic obstructive pulmonary disease can identify a self-perceived dyspnoea threshold during the 6MWT. This HR at the dyspnoea threshold is highly reproducible and enable estimation of the HR at the ventilatory threshold. |
| Databáze: | OpenAIRE |
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