Ventilatory and Near-Infrared Spectroscopy Responses Similarly Determine Anaerobic Threshold in Patients With Heart Failure.
Journal
Journal of cardiopulmonary rehabilitation and prevention
ISSN: 1932-751X
Titre abrégé: J Cardiopulm Rehabil Prev
Pays: United States
ID NLM: 101291247
Informations de publication
Date de publication:
03 2020
03 2020
Historique:
entrez:
3
3
2020
pubmed:
3
3
2020
medline:
13
7
2021
Statut:
ppublish
Résumé
The present study compared the level of agreement of anaerobic threshold (AT) between ventilatory and near-infrared spectroscopy (NIRS) techniques in patients with chronic heart failure (CHF) and healthy subjects. Patients with CHF (n = 9) and a control group (CG; n = 14) underwent cardiopulmonary exercise testing on a cycle ergometer until physical exhaustion. Determination of AT was performed visually by (1) ventilatory-expired gas analysis curves and (2) oxyhemoglobin (O2Hb) and deoxyhemoglobin (HHb) curves assessed by NIRS. The CHF group presented significantly lower oxygen consumption (O2), heart rate, and workload at AT when compared with the CG measured by NIRS (P < .05). However, the effect size, measured by the Cohen d, revealed large magnitude (>0.80) in both techniques when compared between CHF patients and the CG. In addition, ventilatory and NIRS techniques demonstrated significant and very strong/strong correlations for relative O2 (r = 0.91) and heart rate (r = 0.85) in the detection of AT in the CHF group. Both ventilatory and NIRS assessments are correlated and there are no differences in the responses between CHF patients and healthy subjects in the determination of AT. These findings indicate both approaches may have utility in the assessment of submaximal exercise performance in patients with CHF.
Identifiants
pubmed: 32118656
doi: 10.1097/HCR.0000000000000462
pii: 01273116-202003000-00008
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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