| Is postconditioning effective in prevention against long-lasting myocardial ischemia in the rabbit? | |
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MedLine Citation:
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PMID: 19093726 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The goal of the study was to determine whether postconditioning protects against different ischemia durations in the rabbit. Rabbits were assigned to a 20-, 25-, 45- or 60-min coronary occlusion followed by 24-h of reperfusion. Rabbits received no further intervention (control) or were postconditioned with four cycles of 30-s occlusion and 30-s reperfusion after myocardial infarction. Plasma levels of troponin I were quantified throughout reperfusion. In control conditions, infarct sizes (% area at risk using triphenyltetrazolium chloride) after 20, 25, 45 and 60 min of coronary occlusions were 23+/-3, 51+/-4, 70+/-3 and 81+/-3 %, respectively. With 20 and 25 min occlusion, postconditioning reduced infarct size by 43+/-10 and 73+/-21 %, respectively. On the other hand, with 45 or 60 min occlusion, postconditioning had no significant effects on infarct size (61+/-3 and 80+/-2 % of area at risk). Preconditioning protocol was performed with 25- and 60-min coronary occlusion. As expected, preconditioning significantly reduced infarct size. In conclusion, in the rabbit, the cardioprotection afforded by postconditioning is limited to less than 45 min coronary occlusion. |
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Authors:
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R L??tienne; Y Calmettes; B Le Grand |
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Publication Detail:
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Type: Journal Article Date: 2008-11-04 |
Journal Detail:
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Title: Physiological research / Academia Scientiarum Bohemoslovaca Volume: 58 ISSN: 0862-8408 ISO Abbreviation: Physiol Res Publication Date: 2009 |
Date Detail:
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Created Date: 2009-12-07 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9112413 Medline TA: Physiol Res Country: Czech Republic |
Other Details:
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Languages: eng Pagination: 635-43 Citation Subset: IM |
Affiliation:
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Centre de Recherche Pierre Fabre, 17 Av. Jean Moulin, 81106 Castres, France. robert.letienne@pierre-fabre.com |
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