| Full text | |
| Author(s): |
Borghi-Silva, Audrey
[1]
;
Reis, Michel Silva
[1]
;
Mendes, Renata Gonqalves
[1]
;
Falasco Pantoni, Camila Bianca
[1]
;
Simoes, Rodrigo Polaquini
[1]
;
Barreto Martins, Luis Eduardo
[2]
;
Catai, Aparecida Maria
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Fed Sao Carlos, Cardiopulm Physiotherapy Lab, Dept Physiotherapy, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Estadual Campinas, Exercise Physiol Lab, Fac Phys Educ, Campinas, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | RESPIRATORY MEDICINE; v. 102, n. 8, p. 1117-1123, AUG 2008. |
| Web of Science Citations: | 29 |
| Abstract | |
Objective: The purpose of present study was to evaluate the acute effects of bi-level positive airway pressure (BiPAP) on heart rate variability (HRV) of stable chronic obstructive pulmonary disease patients (COPD). Methods: Nineteen mates with COPD (69 +/- 8 years and with forced expiratory volume in 1 s <50% of predicted) and eight healthy sedentary age-matched (69 years) males in the control group (CG) were evaluated during two conditions of controlled respiratory rate: spontaneous breathing (SB) and BiPAP (inspiratory and expiratory levels between 12-14 cmH(2)O and 4-6 cmH(2)O, respectively). Peripheral oxygen saturation (SpO(2)), end-tidal of carbon dioxide (ETCO2), systolic blood pressure (SBP) and R-R interval were obtained. HRV was analyzed by time (RMSSD and SDNN index) and frequency domains (high frequency - HF, low frequency - LF and HF/LF ratio). Results: Significant reduction of ETCO2 and SBP in both groups and increase of SpO(2) in COPD group was observed during BiPAP ventilation (p < 0.05). During spontaneous breathing, patients with COPD presented lower values of LF, LF/HF and higher values of HF when compared to CG (p < 0.05). However, HF was significantly reduced and LF increased during BiPAP ventilation (58 +/- 19-48 +/- 15 and 41 +/- 19-52 +/- 15un, respectively) in COPD group. Significant correlations between delta BiPAP-SB (Delta) ETCO2 and Delta HF were found (r = 0.89). (AU) | |
| FAPESP's process: | 05/59427-7 - Efeito da modulação autonômica cardíaca em pacientes submetidos à cirurgia de revascularização do miocárdio e programa de fisioterapia: fase I da reabilitação cardiovascular |
| Grantee: | Audrey Borghi Silva |
| Support Opportunities: | Regular Research Grants |