Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/193950 |
Resumo: | The main objective was to assess the effects of abdominal breathing (AB) versus subject’s own breathing on femoral venous blood flow (Qfv) and their repercussions on central hemodynamics at rest and during exercise contrasting healthy subjects versus heart failure (HF) patients. We measured esophageal and gastric pressure (PGA), Qfv and parameters of central hemodynamics in eight healthy subjects and nine HF patients, under four conditions: subject’s own breathing and AB (ΔPGA ≥ 6 cmH2O) at rest and during knee extension exercises (15% of 1 repetition maximum) until exhaustion. Qfv and parameters of central hemodynamics [stroke volume (SV), cardiac output (CO)] were measured using Doppler ultrasound and impedance cardiography, respectively. At rest, healthy subjects Qfv, SV, and CO were higher during AB than subject’s breathing (0.11 0.02 vs. 0.06 0.00 L min 1, 58.7 3.4 vs. 50.1 4.1 mL and 4.4 0.2 vs. 3.8 0.1 L min 1, respectively, P ≤ 0.05). ΔSV correlated with ΔPGA during AB (r = 0.89, P ≤ 0.05). This same pattern of findings induced by AB was observed during exercise (SV: 71.1 4.1 vs. 65.5 4.1 mL and CO: 6.3 0.4 vs. 5.2 0.4 L min 1; P ≤ 0.05); however, Qfv did not reach statistical significance. The HF group tended to increase their Qfv during AB (0.09 0.01 vs. 0.07 0.03 L min 1, P = 0.09). On the other hand, unlike the healthy subjects, AB did not improve SV or CO neither at rest nor during exercise (P > 0.05). In healthy subjects, abdominal pump modulated venous return improved SV and CO at rest and during exercise. In HF patients, with elevated right atrial and vena caval system pressures, these findings were not observed. |
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Balzan, Fernanda MachadoSilva, Régis Chiarelli daSilva Junior, Danton Pereira daSanches, Paulo Roberto StefaniTavares, Angela Maria VicenteRibeiro, Jorge PintoBerton, Danilo CortoziClausell, Nadine Oliveira2019-05-08T02:34:23Z20142051-817Xhttp://hdl.handle.net/10183/193950000965254The main objective was to assess the effects of abdominal breathing (AB) versus subject’s own breathing on femoral venous blood flow (Qfv) and their repercussions on central hemodynamics at rest and during exercise contrasting healthy subjects versus heart failure (HF) patients. We measured esophageal and gastric pressure (PGA), Qfv and parameters of central hemodynamics in eight healthy subjects and nine HF patients, under four conditions: subject’s own breathing and AB (ΔPGA ≥ 6 cmH2O) at rest and during knee extension exercises (15% of 1 repetition maximum) until exhaustion. Qfv and parameters of central hemodynamics [stroke volume (SV), cardiac output (CO)] were measured using Doppler ultrasound and impedance cardiography, respectively. At rest, healthy subjects Qfv, SV, and CO were higher during AB than subject’s breathing (0.11 0.02 vs. 0.06 0.00 L min 1, 58.7 3.4 vs. 50.1 4.1 mL and 4.4 0.2 vs. 3.8 0.1 L min 1, respectively, P ≤ 0.05). ΔSV correlated with ΔPGA during AB (r = 0.89, P ≤ 0.05). This same pattern of findings induced by AB was observed during exercise (SV: 71.1 4.1 vs. 65.5 4.1 mL and CO: 6.3 0.4 vs. 5.2 0.4 L min 1; P ≤ 0.05); however, Qfv did not reach statistical significance. The HF group tended to increase their Qfv during AB (0.09 0.01 vs. 0.07 0.03 L min 1, P = 0.09). On the other hand, unlike the healthy subjects, AB did not improve SV or CO neither at rest nor during exercise (P > 0.05). In healthy subjects, abdominal pump modulated venous return improved SV and CO at rest and during exercise. In HF patients, with elevated right atrial and vena caval system pressures, these findings were not observed.application/pdfengPhysiological Reports. Malden, USA. Vol. 2, no. 12 (Dec. 2014), 9p. e12216Débito cardíacoDiafragmaInsuficiência cardíacaExercícioCardiac outputDiaphragmatic contractionVenous returnEffects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exerciseEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT000965254.pdf.txt000965254.pdf.txtExtracted Texttext/plain36165http://www.lume.ufrgs.br/bitstream/10183/193950/2/000965254.pdf.txt422f6307bfa23039e6b358fadfea2a58MD52ORIGINAL000965254.pdfTexto completo (inglês)application/pdf175594http://www.lume.ufrgs.br/bitstream/10183/193950/1/000965254.pdfe19f7fd28924832b8cd7f87dd68df497MD5110183/1939502020-12-13 05:11:42.493349oai:www.lume.ufrgs.br:10183/193950Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2020-12-13T07:11:42Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
title |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
spellingShingle |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise Balzan, Fernanda Machado Débito cardíaco Diafragma Insuficiência cardíaca Exercício Cardiac output Diaphragmatic contraction Venous return |
title_short |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
title_full |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
title_fullStr |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
title_full_unstemmed |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
title_sort |
Effects of diaphragmatic contraction on lower limb venous return and central hemodynamic parameters contrasting healthy subjects versus heart failure patients at rest and during exercise |
author |
Balzan, Fernanda Machado |
author_facet |
Balzan, Fernanda Machado Silva, Régis Chiarelli da Silva Junior, Danton Pereira da Sanches, Paulo Roberto Stefani Tavares, Angela Maria Vicente Ribeiro, Jorge Pinto Berton, Danilo Cortozi Clausell, Nadine Oliveira |
author_role |
author |
author2 |
Silva, Régis Chiarelli da Silva Junior, Danton Pereira da Sanches, Paulo Roberto Stefani Tavares, Angela Maria Vicente Ribeiro, Jorge Pinto Berton, Danilo Cortozi Clausell, Nadine Oliveira |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Balzan, Fernanda Machado Silva, Régis Chiarelli da Silva Junior, Danton Pereira da Sanches, Paulo Roberto Stefani Tavares, Angela Maria Vicente Ribeiro, Jorge Pinto Berton, Danilo Cortozi Clausell, Nadine Oliveira |
dc.subject.por.fl_str_mv |
Débito cardíaco Diafragma Insuficiência cardíaca Exercício |
topic |
Débito cardíaco Diafragma Insuficiência cardíaca Exercício Cardiac output Diaphragmatic contraction Venous return |
dc.subject.eng.fl_str_mv |
Cardiac output Diaphragmatic contraction Venous return |
description |
The main objective was to assess the effects of abdominal breathing (AB) versus subject’s own breathing on femoral venous blood flow (Qfv) and their repercussions on central hemodynamics at rest and during exercise contrasting healthy subjects versus heart failure (HF) patients. We measured esophageal and gastric pressure (PGA), Qfv and parameters of central hemodynamics in eight healthy subjects and nine HF patients, under four conditions: subject’s own breathing and AB (ΔPGA ≥ 6 cmH2O) at rest and during knee extension exercises (15% of 1 repetition maximum) until exhaustion. Qfv and parameters of central hemodynamics [stroke volume (SV), cardiac output (CO)] were measured using Doppler ultrasound and impedance cardiography, respectively. At rest, healthy subjects Qfv, SV, and CO were higher during AB than subject’s breathing (0.11 0.02 vs. 0.06 0.00 L min 1, 58.7 3.4 vs. 50.1 4.1 mL and 4.4 0.2 vs. 3.8 0.1 L min 1, respectively, P ≤ 0.05). ΔSV correlated with ΔPGA during AB (r = 0.89, P ≤ 0.05). This same pattern of findings induced by AB was observed during exercise (SV: 71.1 4.1 vs. 65.5 4.1 mL and CO: 6.3 0.4 vs. 5.2 0.4 L min 1; P ≤ 0.05); however, Qfv did not reach statistical significance. The HF group tended to increase their Qfv during AB (0.09 0.01 vs. 0.07 0.03 L min 1, P = 0.09). On the other hand, unlike the healthy subjects, AB did not improve SV or CO neither at rest nor during exercise (P > 0.05). In healthy subjects, abdominal pump modulated venous return improved SV and CO at rest and during exercise. In HF patients, with elevated right atrial and vena caval system pressures, these findings were not observed. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014 |
dc.date.accessioned.fl_str_mv |
2019-05-08T02:34:23Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/193950 |
dc.identifier.issn.pt_BR.fl_str_mv |
2051-817X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000965254 |
identifier_str_mv |
2051-817X 000965254 |
url |
http://hdl.handle.net/10183/193950 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physiological Reports. Malden, USA. Vol. 2, no. 12 (Dec. 2014), 9p. e12216 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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