Proportional assist ventilation improves leg muscle reoxygenation after exercise in heart failure with reduced ejection fraction
dc.contributor.author | Silva, Audrey Borghi | pt_BR |
dc.contributor.author | Goulart, Cassia da Luz | pt_BR |
dc.contributor.author | Carrascosa, Cláudia R. | pt_BR |
dc.contributor.author | Oliveira, Cristino Carneiro | pt_BR |
dc.contributor.author | Berton, Danilo Cortozi | pt_BR |
dc.contributor.author | Almeida, Dirceu Rodrigues de | pt_BR |
dc.contributor.author | Nery, Luiz Eduardo | pt_BR |
dc.contributor.author | Arena, Ross | pt_BR |
dc.contributor.author | Neder, José Alberto | pt_BR |
dc.date.accessioned | 2024-10-26T06:57:04Z | pt_BR |
dc.date.issued | 2021 | pt_BR |
dc.identifier.issn | 1664-042X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/280610 | pt_BR |
dc.description.abstract | Background: Respiratory muscle unloading through proportional assist ventilation (PAV) may enhance leg oxygen delivery, thereby speeding off-exercise oxygen uptake ( . V O 2 ) kinetics in patients with heart failure with reduced left ventricular ejection fraction (HFrEF). Methods: Ten male patients (HFrEF = 26 ± 9%, age 50 ± 13 years, and body mass index 25 ± 3 kg m2) underwent two constant work rate tests at 80% peak of maximal cardiopulmonary exercise test to tolerance under PAV and sham ventilation. Post-exercise kinetics of . V O 2 , vastus lateralis deoxyhemoglobin ([deoxy-Hb + Mb]) by near-infrared spectroscopy, and cardiac output (QT) by impedance cardiography were assessed. Results: PAV prolonged exercise tolerance compared with sham (587 ± 390 s vs. 444 ± 296 s, respectively; p = 0.01). PAV significantly accelerated . V O 2 recovery (τ = 56 ± 22 s vs. 77 ± 42 s; p < 0.05), being associated with a faster decline in Δ[deoxy-Hb + Mb] and QT compared with sham (τ = 31 ± 19 s vs. 42 ± 22 s and 39 ± 22 s vs. 78 ± 46 s, p < 0.05). Faster off-exercise decrease in QT with PAV was related to longer exercise duration (r = −0.76; p < 0.05). Conclusion: PAV accelerates the recovery of central hemodynamics and muscle oxygenation in HFrEF. These beneficial effects might prove useful to improve the tolerance to repeated exercise during cardiac rehabilitation. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Frontiers in physiology. Lausanne. Vol. 12 (June 2021), 685274, 9 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Ventilação não invasiva | pt_BR |
dc.subject | Blood flow | en |
dc.subject | Heart failure | en |
dc.subject | Exercício físico | pt_BR |
dc.subject | Non-invasive ventilation | en |
dc.subject | Hemodinâmica | pt_BR |
dc.subject | Hemodynamics | en |
dc.subject | Fluxo sangüíneo | pt_BR |
dc.subject | Insuficiência cardíaca | pt_BR |
dc.subject | Exercise recovery | en |
dc.title | Proportional assist ventilation improves leg muscle reoxygenation after exercise in heart failure with reduced ejection fraction | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001206513 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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