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Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload
BACKGROUND: Atrial fibrillation (AF) is often preceded by underlying cardiac diseases causing ventricular pressure overload. OBJECTIVE: It was our aim to investigate the progression of atrial remodeling in a small animal model of ventricular pressure overload and its association with induction of AF...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3765172/ https://www.ncbi.nlm.nih.gov/pubmed/24039788 http://dx.doi.org/10.1371/journal.pone.0072651 |
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author | De Jong, Anne Margreet Van Gelder, Isabelle C. Vreeswijk-Baudoin, Inge Cannon, Megan V. Van Gilst, Wiek H. Maass, Alexander H. |
author_facet | De Jong, Anne Margreet Van Gelder, Isabelle C. Vreeswijk-Baudoin, Inge Cannon, Megan V. Van Gilst, Wiek H. Maass, Alexander H. |
author_sort | De Jong, Anne Margreet |
collection | PubMed |
description | BACKGROUND: Atrial fibrillation (AF) is often preceded by underlying cardiac diseases causing ventricular pressure overload. OBJECTIVE: It was our aim to investigate the progression of atrial remodeling in a small animal model of ventricular pressure overload and its association with induction of AF. METHODS: Male mice were subjected to transverse aortic constriction (TAC) or sham operation. After four or eight weeks, echocardiographic measurements and hemodynamic measurements were made and AF induction was tested. The hearts were either fixed in formalin or ventricles and atria were separated, weighed and snap-frozen for RNA analysis. RESULTS: Four weeks of pressure overload induced ventricular hypertrophy and minor changes in the atria. After eight weeks a significant reduction in left ventricular function occurred, associated with significant atrial remodeling including increased atrial weight, a trend towards an increased left atrial cell diameter, atrial dilatation and increased expression of markers of hypertrophy and inflammation. Histologically, no fibrosis was found in the left atrium. But atrial gene expression related to fibrosis was increased. Minor changes related to electrical remodeling were observed. AF inducibility was not different between the groups. Left ventricular end diastolic pressures were increased and correlated with the severity of atrial remodeling but not with AF induction. CONCLUSION: Permanent ventricular pressure overload by TAC induced atrial remodeling, including hypertrophy, dilatation and inflammation. The extent of atrial remodeling was directly related to LVEDP and not duration of TAC per se. |
format | Online Article Text |
id | pubmed-3765172 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-37651722013-09-13 Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload De Jong, Anne Margreet Van Gelder, Isabelle C. Vreeswijk-Baudoin, Inge Cannon, Megan V. Van Gilst, Wiek H. Maass, Alexander H. PLoS One Research Article BACKGROUND: Atrial fibrillation (AF) is often preceded by underlying cardiac diseases causing ventricular pressure overload. OBJECTIVE: It was our aim to investigate the progression of atrial remodeling in a small animal model of ventricular pressure overload and its association with induction of AF. METHODS: Male mice were subjected to transverse aortic constriction (TAC) or sham operation. After four or eight weeks, echocardiographic measurements and hemodynamic measurements were made and AF induction was tested. The hearts were either fixed in formalin or ventricles and atria were separated, weighed and snap-frozen for RNA analysis. RESULTS: Four weeks of pressure overload induced ventricular hypertrophy and minor changes in the atria. After eight weeks a significant reduction in left ventricular function occurred, associated with significant atrial remodeling including increased atrial weight, a trend towards an increased left atrial cell diameter, atrial dilatation and increased expression of markers of hypertrophy and inflammation. Histologically, no fibrosis was found in the left atrium. But atrial gene expression related to fibrosis was increased. Minor changes related to electrical remodeling were observed. AF inducibility was not different between the groups. Left ventricular end diastolic pressures were increased and correlated with the severity of atrial remodeling but not with AF induction. CONCLUSION: Permanent ventricular pressure overload by TAC induced atrial remodeling, including hypertrophy, dilatation and inflammation. The extent of atrial remodeling was directly related to LVEDP and not duration of TAC per se. Public Library of Science 2013-09-06 /pmc/articles/PMC3765172/ /pubmed/24039788 http://dx.doi.org/10.1371/journal.pone.0072651 Text en © 2013 De Jong et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article De Jong, Anne Margreet Van Gelder, Isabelle C. Vreeswijk-Baudoin, Inge Cannon, Megan V. Van Gilst, Wiek H. Maass, Alexander H. Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload |
title | Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload |
title_full | Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload |
title_fullStr | Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload |
title_full_unstemmed | Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload |
title_short | Atrial Remodeling Is Directly Related to End-Diastolic Left Ventricular Pressure in a Mouse Model of Ventricular Pressure Overload |
title_sort | atrial remodeling is directly related to end-diastolic left ventricular pressure in a mouse model of ventricular pressure overload |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3765172/ https://www.ncbi.nlm.nih.gov/pubmed/24039788 http://dx.doi.org/10.1371/journal.pone.0072651 |
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