8 research outputs found
Bi-level positive airway pressure produces an increase of sympathetic response in healthy young men
Heart rate variability and pulmonary function behavior in patients undergoing coronary artery bypass grafting and physiotherapy intervention
Effects of different levels of positive airway pressure on breathing pattern and heart rate variability after coronary artery bypass grafting surgery
Variabilidade da frequência cardÃaca como recurso em fisioterapia: análise de periódicos nacionais
Estudo da modulação autonômica da freqüência cardÃaca em repouso de pacientes idosos com doença pulmonar obstrutiva crônica
Noninvasive ventilation acutely modifies heart rate variability in chronic obstructive pulmonary disease patients
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)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).102811171123Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)FAPESP [05/59427-7