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Early short-term vagal nerve stimulation attenuates cardiac remodeling after reperfused myocardial infarction.
MedLine Citation:
PMID:  20670848     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND: Vagal nerve stimulation (VS) has been suggested to be an effective adjunct to reperfusion therapy in myocardial infarction (MI). However, the effect of VS on left ventricular (LV) remodeling after reperfused MI has not been examined.
METHODS AND RESULTS: We investigated the effects of early, brief VS on acute inflammatory reactions (study 1) and chronic LV remodeling (study 2) in a rabbit model of reperfused MI. In study 1, rabbits were subjected to 60-minute coronary artery occlusion followed by reperfusion alone (MI, n = 8) or treated with 24-hour VS (MI-VS, n = 8). At 24 hours after ischemia-reperfusion, MI-VS rabbits showed significantly decreased myocardial infiltration of neutrophils and reduced myocardial expressions of tumor necrosis factor-alpha and matrix metalloproteinase-8 and -9, compared with MI rabbits. Myocardial expression of interleukin-6 was not affected by VS. In study 2, rabbits were subjected to coronary occlusion and reperfusion alone (n = 16) or treated with VS for 3 days (n = 14). At 8 weeks after ischemia-reperfusion, MI-VS rabbits showed significantly improved LV dysfunction and dilatation, and significantly reduced infarct size, infarct wall thinning, and LV weight compared with MI rabbits.
CONCLUSION: Early, short-term VS attenuates LV remodeling after reperfused MI, which may be associated with suppression of acute inflammatory reactions.
Authors:
Kazunori Uemura; Can Zheng; Meihua Li; Toru Kawada; Masaru Sugimachi
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-04-08
Journal Detail:
Title:  Journal of cardiac failure     Volume:  16     ISSN:  1532-8414     ISO Abbreviation:  J. Card. Fail.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9442138     Medline TA:  J Card Fail     Country:  United States    
Other Details:
Languages:  eng     Pagination:  689-99     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Elsevier Inc. All rights reserved.
Affiliation:
Department of Cardiovascular Dynamics, Advanced Medical Engineering Center, National Cardiovascular Center Research Institute, Suita, Japan. kuemura@ri.ncvc.go.jp
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