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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Acute effects of expiratory positive pressure on autonomic cardiac modulation during spontaneous and slow deep breathing in COPD patients

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Author(s):
ANDRÉA L.G. DA SILVA [1] ; CÁSSIA L. GOULART [2] ; KAMILA M.K. MANSOUR [3] ; GUILHERME D. BACK [4] ; RAMONA CABIDDU [5] ; RENATA TRIMER [6] ; AUDREY BORGHI-SILVA [7]
Total Authors: 7
Affiliation:
[1] Universidade de Santa Cruz do Sul. Departamento de Ciências da Saúde - Brasil
[2] Universidade de Santa Cruz do Sul. Departamento de Ciências da Saúde - Brasil
[3] Programa de Residência Multiprofissional em Saúde/ Fisioterapia. Hospital Santa Cruz - Brasil
[4] Universidade de Santa Cruz do Sul. Departamento de Ciências da Saúde - Brasil
[5] Universidade Federal de São Carlos. Departamento de Fisioterapia - Brasil
[6] Universidade de Santa Cruz do Sul. Departamento de Ciências da Saúde - Brasil
[7] Universidade Federal de São Carlos. Departamento de Fisioterapia - Brasil
Total Affiliations: 7
Document type: Journal article
Source: Anais da Academia Brasileira de Ciências; v. 92, n. 2 2020-07-20.
Abstract

Abstract Aim: to evaluate the acute effects of expiratory positive airway pressure on cardiac autonomic modulation in chronic obstructive pulmonary disease patients during spontaneous breathing and slow deep breathing. Methods: 17 patients were evaluated. The R-R intervals were collected (Polar® S810i) during spontaneous breathing (10 minutes) and slow deep breathing (4 minutes), with and without 5 cmH2O expiratory positive airway pressure. Stable signals were analyzed by Kubios®. Heart rate variability indices were computed in time domain and in frequency domain. Results: Expiratory positive airway pressure application affected low frequency (spontaneous breathing: 62.5±4.1 vs slow deep breathing: 28.2±4.2, p<0.001) and high frequency (spontaneous breathing: 37.4±17.3 vs slow deep breathing: 58.9±18.1, p<0.001). Interactions were observed between expiratory positive airway pressure effect and slow deep breathing effect for low frequency (p<0.001), high frequency (p<0.001) and low frequency/high frequency ratio (p<0.001). When patients were stratified by disease’s severity, we identified a significant low frequency reduction (p<0.001) and high frequency increase (p<0.001) for all stages when slow deep breathing was associated with expiratory positive airway pressure. Conclusion: A 5 cmH2O expiratory positive airway pressure during spontaneous and slow deep breathing can elicit an acute response, resulting in a cardiac autonomic control improvement in moderate-to-very severe patients. (AU)

FAPESP's process: 13/23013-0 - Heart rate variability and cardiorespiratory coupling in the coexistence of chronic obstructive pulmonary disease associated with obstructive sleep apnea
Grantee:Renata Trimer
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/04101-1 - Clinical, functional and systemic effects of whole-body electrical stimulation after bariatric surgery
Grantee:Audrey Borghi Silva
Support Opportunities: Regular Research Grants