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Electrocardiography as a Tool for Validating Myocardial Ischemia–Reperfusion Procedures in Mice

机译:心电图学作为验证小鼠心肌缺血再灌注程序的工具

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Thispaperevaluatesthemodificationsinducedbyischemiaandischemia#8211;reperfusioninmiceafterpermanentortransient,respectively,ligationoftheleftcoronaryarteryandestablishesacorrelationamongtheextentofischemia,electrocardiographfeatures,andinfarctsize.Theleftcoronaryarterywasligated1mmdistalfromthetipoftheleftauricle.Histologicanalysisrevealedthat30-minischemia(n=9)ledtoinfarctioninvolving9.7%±0.5%oftheleftventricle,whereas1-hischemia(n=9)resultedintransmuralinfarctionof16.1%±4.6%oftheleftventricle.Incontrast,24-hischemia(n=8)andpermanentischemia(n=8)inducedsimilarlysizedinfarcts(33%±2%and31.8%±0.7%,respectively),suggestingineffectivereperfusionafter24-hischemia.ElectrocardiographyrevealedthatligationoftheleftcoronaryarteryledtoSTheightelevation(204comparedwith14#59157;V)andQTcprolongation(136comparedwith76ms).Bothparametersrapidlynormalizedonreperfusion,demonstratingthatelectrocardiographywasimportantforvalidatingcorrectligationandreperfusion.Inaddition,electrocardiographypredictedtheseverityofthemyocardialdamageinducedbyischemia.Ourresultsshowthatelectrocardiographicchangespresentafter30-minischemiawerereversedonreperfusion;however,prolongedischemiainducedpathologicelectrocardiographicpatternsthatremainedevenafterreperfusion.Themousemodelofmyocardialischemia#8211;reperfusioncanbeimprovedbyusingelectrocardiographytovalidateligationandreperfusionduringsurgeryandtopredicttheseverityofinfarction.
机译:Thispaperevaluatesthemodificationsinducedbyischemiaandischemia#8211; reperfusioninmiceafterpermanentortransient分别ligationoftheleftcoronaryarteryandestablishesacorrelationamongtheextentofischemia,electrocardiographfeatures,andinfarctsize.Theleftcoronaryarterywasligated1mmdistalfromthetipoftheleftauricle.Histologicanalysisrevealedthat30-minischemia(N = 9)ledtoinfarctioninvolving9.7%±0.5%oftheleftventricle,whereas1-hischemia(N = 9)resultedintransmuralinfarctionof16.1%±4.6%oftheleftventricle。与此相反,24缺血(n = 8)和永久性充血(n = 8)诱发相似的梗死面积(分别为33%±2%和31.8%±0.7%),提示24缺血后有效再灌注。心电图显示,将左冠状动脉结扎并加长(76)并加字线(字号:C)通过水平为86(第157号)的结扎(136)。两种参数在再灌注时均迅速标准化,表明心电图对于验证结扎和再灌注非常重要。此外,心电图可预测结果表明,心电图改变在30微米缺血性再灌注后仍然存在;然而,长时间的缺血诱导病理性心电图模式在再灌注后仍保持不变。心肌缺血化学的电击模型#8211可以通过再灌注来证实再灌注有效,并通过使用电法可以证明再灌注是有效的。

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