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ID:20066898
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页数:4页
时间:2018-10-09
《肢体缺血预处理对心脏瓣膜置换术心肌保护作用的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、【摘要】 目的:探讨肢体缺血预处理(IPC)在心脏瓣膜置换术中对心肌缺血再灌注损伤的保护作用。方法:30例心脏瓣膜置换术患者随机分为IPC组和对照组。IPC组在主动脉阻断前10min内,用气压止血带绑于右上臂上部,给于300mmHg的压力,阻断右上肢血流,持续3min,开放2min后,再重复上述过程一次;对照组不给缺血预处理。记录两组临床指标及心肌电生理指标;分别于主动脉阻断前,主动脉开放即刻、开放后3h、6h、12h、24h抽取桡动脉血,检测心肌酶肌酸酶同工酶(CK-MB)、肌钙蛋白I(cTnI)的水平;观察心肌超微结构变化。结果:两组开放后辅助循环时间IPC组明显
2、低于对照组(P<0105);对照组术后室性心律失常发生率、需重复除颤率明显高于IPC组(P均<0101);主动脉开放后12h心肌酶CK-MB及cTnI对照组明显高于IPC组,分别为[(14119±2112)U/L∶(9819±1713)U/L,(51.5 7±11207)ng/ml∶(21113±01984)ng/ml,P<0105,<0101]。IPC组心肌超微结构保存较好,损伤较对照组轻(P<0101)。结论:肢体IPC可减少心肌酶漏出,降低术后室性心律失常发生率,减轻心肌超微结构损伤,对心肌缺血再灌注损伤有保护作用。【关键词】缺血预处理;肢体;心脏瓣膜 Clin
3、icalstudyoflimbischemicpreconditioningonmyocardialischemia2reperfusioninjuryduringopenheartsurgery LIU Xiao jun,YIShan yong,LIAOBin,DENGMing bin,CHENSheng jie,WANGFeng ChineseJournalofCardiovas2cularRehabilitationMedicine,2007,16(4):347Abstract:Objective:Toevaluatethemyocardialprotecti
4、veeffectoflimbischemicpreconditioningonmyocardiumis2chemia2reperfusioninjuryduringheartvalvereplacementsurgery.Methods:Thirtypatientsrequiredheartvalvere2placementweredividedrandomlyintotwogroups:IPCgroup(n=15)andcontrolgroup(n=15).Aairpressuretourniquetwrappedaroundtherightupperextremit
5、yofthepatient,wasinflateanddeflatetwicetoperform3minofitslimbischemiaand2minofitslimbreperfusionintheIPCgroupatthe10minutesbeforeaortaclamping1CK-MB(creatinekinase-MB)andcTnI(cardiactroponin-I)weremeasuredintwogroupsrespectivelybeforecardiopulmo2narybypass(CPB)andimmediately,3h,6h,12h,24
6、hafterCPB,fromthepatient'radialarterialbloodsamples.Myocardialultrastucturechangesintwogroupswereassessed.Results:ThesupplementarycirculationtimeinIPCgroupwasmuchshorterthanthatofcontrolgroup(P<0105).ThefrequenceofdefibrillationandtheincidenceofventriculararrhythmiaofIPCgroupwerelessthan
7、thoseofcontrolgroup(P<0101all).TheSerumconcentrationofCK-MBandcTnIlevelsincontrolgroupandIPCgrouprespectivelywere(14119±2112)vs.(9819±1713)U/L;(51.5 7±11207)vs.(21113±01984)ng/ml(P<0105,<0101)afteraortaoff2clamping12h.Themyocardialul2trastructuredamageinIPCgroupwassignifi
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