Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial

Detalhes bibliográficos
Autor(a) principal: Pacheco,Deise M.
Data de Publicação: 2016
Outros Autores: Silveira,Viviane D., Thomaz,Alex, Nunes,Ramiro B., Elsner,Viviane R., Dal Lago,Pedro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Physical Therapy
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-35552016000400320
Resumo: ABSTRACT Objective To analyze respiratory mechanics and hemodynamic alterations in an experimental model of chronic heart failure (CHF) following myocardial infarction. Method Twenty-seven male adult Wistar rats were randomized to CHF group (n=12) or Sham group (n=15). Ten weeks after coronary ligation or sham surgery, the animals were anesthetized and submitted to respiratory mechanics and hemodynamic measurements. Pulmonary edema as well as cardiac remodeling were measured. Results The CHF rats showed pulmonary edema 26% higher than the Sham group. The respiratory system compliance (Crs) and the total lung capacity (TLC) were lower (40% and 27%, respectively) in the CHF rats when compared to the Sham group (P<0.01). There was also an increase in tissue resistance (Gti) and elastance (Hti) (28% and 45%, respectively) in the CHF group. Moreover, left ventricular end-diastolic pressure was higher (32 mmHg vs 4 mmHg, P<0.01), while the left ventricular systolic pressure was lower (118 mmHg vs 130 mmHg, P=0.02) in the CHF group when compared to the control. Pearson’s correlation coefficient showed a negative association between pulmonary edema and Crs (r=–0.70, P=0.0001) and between pulmonary edema and TLC (r=–0.67, P=0.0034). Pulmonary edema correlated positively with Gti (r=0.68, P=0.001) and Hti (r=0.68, P=0.001). Finally, there was a strong positive relationship between pulmonary edema and heart weight (r=0.80, P=0.001). Conclusion Rats with CHF present important changes in hemodynamic and respiratory mechanics, which may be associated with alterations in cardiopulmonary interactions.
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spelling Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trialheart failurerespiratory mechanicscontrolled trialpulmonary edemacardiac hypertrophyratsABSTRACT Objective To analyze respiratory mechanics and hemodynamic alterations in an experimental model of chronic heart failure (CHF) following myocardial infarction. Method Twenty-seven male adult Wistar rats were randomized to CHF group (n=12) or Sham group (n=15). Ten weeks after coronary ligation or sham surgery, the animals were anesthetized and submitted to respiratory mechanics and hemodynamic measurements. Pulmonary edema as well as cardiac remodeling were measured. Results The CHF rats showed pulmonary edema 26% higher than the Sham group. The respiratory system compliance (Crs) and the total lung capacity (TLC) were lower (40% and 27%, respectively) in the CHF rats when compared to the Sham group (P<0.01). There was also an increase in tissue resistance (Gti) and elastance (Hti) (28% and 45%, respectively) in the CHF group. Moreover, left ventricular end-diastolic pressure was higher (32 mmHg vs 4 mmHg, P<0.01), while the left ventricular systolic pressure was lower (118 mmHg vs 130 mmHg, P=0.02) in the CHF group when compared to the control. Pearson’s correlation coefficient showed a negative association between pulmonary edema and Crs (r=–0.70, P=0.0001) and between pulmonary edema and TLC (r=–0.67, P=0.0034). Pulmonary edema correlated positively with Gti (r=0.68, P=0.001) and Hti (r=0.68, P=0.001). Finally, there was a strong positive relationship between pulmonary edema and heart weight (r=0.80, P=0.001). Conclusion Rats with CHF present important changes in hemodynamic and respiratory mechanics, which may be associated with alterations in cardiopulmonary interactions.Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia 2016-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-35552016000400320Brazilian Journal of Physical Therapy v.20 n.4 2016reponame:Brazilian Journal of Physical Therapyinstname:Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT)instacron:ABRAPG-FT10.1590/bjpt-rbf.2014.0163info:eu-repo/semantics/openAccessPacheco,Deise M.Silveira,Viviane D.Thomaz,AlexNunes,Ramiro B.Elsner,Viviane R.Dal Lago,Pedroeng2016-08-18T00:00:00Zoai:scielo:S1413-35552016000400320Revistahttps://www.scielo.br/j/rbfis/https://old.scielo.br/oai/scielo-oai.phpcontato@rbf-bjpt.org.br||contato@rbf-bjpt.org.br1809-92461413-3555opendoar:2016-08-18T00:00Brazilian Journal of Physical Therapy - Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT)false
dc.title.none.fl_str_mv Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
title Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
spellingShingle Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
Pacheco,Deise M.
heart failure
respiratory mechanics
controlled trial
pulmonary edema
cardiac hypertrophy
rats
title_short Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
title_full Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
title_fullStr Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
title_full_unstemmed Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
title_sort Chronic heart failure modifies respiratory mechanics in rats: a randomized controlled trial
author Pacheco,Deise M.
author_facet Pacheco,Deise M.
Silveira,Viviane D.
Thomaz,Alex
Nunes,Ramiro B.
Elsner,Viviane R.
Dal Lago,Pedro
author_role author
author2 Silveira,Viviane D.
Thomaz,Alex
Nunes,Ramiro B.
Elsner,Viviane R.
Dal Lago,Pedro
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Pacheco,Deise M.
Silveira,Viviane D.
Thomaz,Alex
Nunes,Ramiro B.
Elsner,Viviane R.
Dal Lago,Pedro
dc.subject.por.fl_str_mv heart failure
respiratory mechanics
controlled trial
pulmonary edema
cardiac hypertrophy
rats
topic heart failure
respiratory mechanics
controlled trial
pulmonary edema
cardiac hypertrophy
rats
description ABSTRACT Objective To analyze respiratory mechanics and hemodynamic alterations in an experimental model of chronic heart failure (CHF) following myocardial infarction. Method Twenty-seven male adult Wistar rats were randomized to CHF group (n=12) or Sham group (n=15). Ten weeks after coronary ligation or sham surgery, the animals were anesthetized and submitted to respiratory mechanics and hemodynamic measurements. Pulmonary edema as well as cardiac remodeling were measured. Results The CHF rats showed pulmonary edema 26% higher than the Sham group. The respiratory system compliance (Crs) and the total lung capacity (TLC) were lower (40% and 27%, respectively) in the CHF rats when compared to the Sham group (P<0.01). There was also an increase in tissue resistance (Gti) and elastance (Hti) (28% and 45%, respectively) in the CHF group. Moreover, left ventricular end-diastolic pressure was higher (32 mmHg vs 4 mmHg, P<0.01), while the left ventricular systolic pressure was lower (118 mmHg vs 130 mmHg, P=0.02) in the CHF group when compared to the control. Pearson’s correlation coefficient showed a negative association between pulmonary edema and Crs (r=–0.70, P=0.0001) and between pulmonary edema and TLC (r=–0.67, P=0.0034). Pulmonary edema correlated positively with Gti (r=0.68, P=0.001) and Hti (r=0.68, P=0.001). Finally, there was a strong positive relationship between pulmonary edema and heart weight (r=0.80, P=0.001). Conclusion Rats with CHF present important changes in hemodynamic and respiratory mechanics, which may be associated with alterations in cardiopulmonary interactions.
publishDate 2016
dc.date.none.fl_str_mv 2016-08-01
dc.type.driver.fl_str_mv 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://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-35552016000400320
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-35552016000400320
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/bjpt-rbf.2014.0163
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia
publisher.none.fl_str_mv Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia
dc.source.none.fl_str_mv Brazilian Journal of Physical Therapy v.20 n.4 2016
reponame:Brazilian Journal of Physical Therapy
instname:Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT)
instacron:ABRAPG-FT
instname_str Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT)
instacron_str ABRAPG-FT
institution ABRAPG-FT
reponame_str Brazilian Journal of Physical Therapy
collection Brazilian Journal of Physical Therapy
repository.name.fl_str_mv Brazilian Journal of Physical Therapy - Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT)
repository.mail.fl_str_mv contato@rbf-bjpt.org.br||contato@rbf-bjpt.org.br
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