Are heart rate dynamics in the transition from rest to submaximal exercise related to maximal cardiorespiratory responses in COPD?

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dc.citation.issue4]
dc.citation.volume21]
dc.contributor.authorMazzuco, Adriana
dc.contributor.authorMedeiros, Wladimir Musetti [UNIFESP]
dc.contributor.authorde Souza, Aline Soares [UNIFESP]
dc.contributor.authorNoman Alencar, Maria Clara [UNIFESP]
dc.contributor.authorNeder, Jose Alberto [UNIFESP]
dc.contributor.authorBorghi-Silva, Audrey
dc.coverageSao Carlos Sp
dc.date.accessioned2020-06-26T16:30:21Z
dc.date.available2020-06-26T16:30:21Z
dc.date.issued2017
dc.description.abstractBackground: Poor exercise capacity is an important negative prognostic marker in patients with chronic obstructive pulmonary disease (COPD). Heart rate variability (HRV) responses can indicate alterations in cardiac autonomic control. Nevertheless, it remains unclear whether these abnormalities are related to cardiorespiratory responses to exercise in these patients. Objective: To evaluate whether HRV at rest and submaximal exercise are related to impaired cardiopulmonary responses to exercise in COPD patients. Methods: Fifteen men (66.2 +/- 8.7 years) with COPD (FEV1: 55.1 +/- 19.2%) were assessed. The R-R interval (RRi) data collection was performed at rest (stand position) and during the six-minute walk test (6MWT). All patients performed a symptom-limited cardiopulmonary exercise test on a cycle ergometer. The HRV changes from rest to submaximal exercise (Delta rest-6MWT) were calculated. Results: We found significant correlations between low frequency (LF) and high frequency (HF) Delta rest-6MWT with Delta oxyhemoglobin saturation by pulse oximetry (r = -0.64 and r = 0.65, respectivelyen
dc.description.abstractp < 0.05), minute ventilation/carbon dioxide output relationship from beginning to peak exercise (r = -0.52 and r = 0.53, p < 0.05), and exercise ventilatory power (r = 0.52 and r =-0.53, p < 0.05). Interestingly, there was a strong positive correlation (r = 0.82, p < 0.05) between six-minute walk distance (6MWD) and Delta LF/HF from rest to exercise. Conclusion: HRV analysis in the transition from rest to submaximal exercise is associated with exercise ventilatory and hemodynamic abnormalities in COPD patients. Rehabilitative strategies to improve HRV responses may provide an important tool to clinical practice in these patients. (C) 2017 Associacao Brasileira de Pesquisa e Pos-Graduacao em Fisioterapia. Published by Elsevier Editora Ltda. All rights reserved.en
dc.description.affiliationUniv Fed Sao Carlos, Lab Fisioterapia Cardiopulm LACAP, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Dept Med, Disciplina Pneumol, Setor Funcao Pulm & Fisiol Clin Exercicio SEFICE, Sao Paulo, SP, Brazil
dc.description.affiliationQueens Univ, Dept Med, Div Resp & Crit Care Med, Lab Clin Exercise Physiol LACEP, Kingston, ON, Canada
dc.description.affiliationUnifespUniv Fed Sao Paulo, Dept Med, Disciplina Pneumol, Setor Funcao Pulm & Fisiol Clin Exercicio SEFICE, Sao Paulo, SP, Brazil
dc.description.sourceWeb of Science
dc.format.extent251-258
dc.identifierhttp://dx.doi.org/10.1016/j.bjpt.2017.05.002]
dc.identifier.citationBrazilian Journal Of Physical Therapy. Sao Carlos Sp, v. 21, n. 4, p. 251-258, 2017.
dc.identifier.doi10.1016/j.bjpt.2017.05.002
dc.identifier.issn1413-3555
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/53499
dc.identifier.wosWOS:000414257500004
dc.language.isoeng
dc.publisherAssociacao Brasileira Pesquisa Pos-Graduacao Fisioterapia-Abrapg-Ft
dc.relation.ispartofBrazilian Journal Of Physical Therapy
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectSix minute walk testen
dc.subjectCardiopulmonary exercise testingen
dc.subjectCardiac autonomic nervous systemen
dc.subjectRehabilitationen
dc.titleAre heart rate dynamics in the transition from rest to submaximal exercise related to maximal cardiorespiratory responses in COPD?en
dc.typeinfo:eu-repo/semantics/article
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