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The variable functional effects of the pacing site in normal and scarred ventricles
BACKGROUND: The pacing site has been shown to influence functional improvement with cardiac resynchronization therapy. We evaluated the effects of the pacing site on left ventricular (LV) function in an animal model. METHODS AND RESULTS: Equilibrium radionuclide angiography was acquired in sinus rhy...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
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Springer-Verlag
2009
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2776147/ https://www.ncbi.nlm.nih.gov/pubmed/19760474 http://dx.doi.org/10.1007/s12350-009-9135-4 |
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author | Muñoz del Romeral, Luisa Stillson, Carol Lesh, Michael Botvinick, Elias |
author_facet | Muñoz del Romeral, Luisa Stillson, Carol Lesh, Michael Botvinick, Elias |
author_sort | Muñoz del Romeral, Luisa |
collection | PubMed |
description | BACKGROUND: The pacing site has been shown to influence functional improvement with cardiac resynchronization therapy. We evaluated the effects of the pacing site on left ventricular (LV) function in an animal model. METHODS AND RESULTS: Equilibrium radionuclide angiography was acquired in sinus rhythm (NSR) and with ventricular pacing, from three pacing sites in seven normal and eight infarcted dogs. QRS duration, electrical activation pattern, wall motion, LV ejection fraction (EF), synchrony of ventricular contraction, and mean arterial pressure (MAP), were related to the pacing site and infarct size, during each of 120 episodes. Little changed during pacing in normals. In infarcted dogs, LV wall motion, and synchrony worsened, LVEF and MAP often fell. These changes related to altered activation patterns which were influenced by the pacing site but were not related to infarct size. CONCLUSIONS: Hemodynamic and functional LV changes after infarction were found to vary with the pacing site and associated conduction and synchrony. |
format | Text |
id | pubmed-2776147 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Springer-Verlag |
record_format | MEDLINE/PubMed |
spelling | pubmed-27761472009-11-16 The variable functional effects of the pacing site in normal and scarred ventricles Muñoz del Romeral, Luisa Stillson, Carol Lesh, Michael Botvinick, Elias J Nucl Cardiol Original Article BACKGROUND: The pacing site has been shown to influence functional improvement with cardiac resynchronization therapy. We evaluated the effects of the pacing site on left ventricular (LV) function in an animal model. METHODS AND RESULTS: Equilibrium radionuclide angiography was acquired in sinus rhythm (NSR) and with ventricular pacing, from three pacing sites in seven normal and eight infarcted dogs. QRS duration, electrical activation pattern, wall motion, LV ejection fraction (EF), synchrony of ventricular contraction, and mean arterial pressure (MAP), were related to the pacing site and infarct size, during each of 120 episodes. Little changed during pacing in normals. In infarcted dogs, LV wall motion, and synchrony worsened, LVEF and MAP often fell. These changes related to altered activation patterns which were influenced by the pacing site but were not related to infarct size. CONCLUSIONS: Hemodynamic and functional LV changes after infarction were found to vary with the pacing site and associated conduction and synchrony. Springer-Verlag 2009-09-04 2009 /pmc/articles/PMC2776147/ /pubmed/19760474 http://dx.doi.org/10.1007/s12350-009-9135-4 Text en © The Author(s) 2009 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Original Article Muñoz del Romeral, Luisa Stillson, Carol Lesh, Michael Botvinick, Elias The variable functional effects of the pacing site in normal and scarred ventricles |
title | The variable functional effects of the pacing site in normal and scarred ventricles |
title_full | The variable functional effects of the pacing site in normal and scarred ventricles |
title_fullStr | The variable functional effects of the pacing site in normal and scarred ventricles |
title_full_unstemmed | The variable functional effects of the pacing site in normal and scarred ventricles |
title_short | The variable functional effects of the pacing site in normal and scarred ventricles |
title_sort | variable functional effects of the pacing site in normal and scarred ventricles |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2776147/ https://www.ncbi.nlm.nih.gov/pubmed/19760474 http://dx.doi.org/10.1007/s12350-009-9135-4 |
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