简介：血小板在动脉粥样硬化斑块破裂后血栓形成发病机制中发挥关键作用，因而针对血小板激活途径的药物成为抗栓治疗的主要手段。循证医学表明，抗血小板治疗可以有效地预防动脉粥样硬化疾病患者发生严重的心血管事件。已经成为防治急性冠脉综合征的主要方法。

简介：预适应（preconditioning，PC）现象是1986年由Murry等首先报道的狗的一种心肌自我保护机制。是指预先给予短暂的几次非致死性缺血，可以提高心肌对后续的长时间的缺血及再灌注损伤的耐受性，这种现象称为缺血预适应（ischemiapreconditioning，IPC）。随后这种现象在猫、鼠、猪、羊等不同的动物中观察到，在人冠心病患者中同样也得到证实。由于这种现象具有明显的临床价值，遂成为了近年来的研究热点。

简介：BackgroundComparedtoclopidogrel,Ticagrelorsignificantlyreducestheriskofcardiovasculareventsinpatientswithacutemyocardialinfarction(AMI)howeverincreasestheincidenceofbleedingandtheriskoffatalintracranialhemorrhage.Inthisstudy,wescreenedtheAMIpatientswithclopidogrelresistence,anddeterminedwhetherticagrelorsequentialtherapycouldreducetheriskofcardiovasculareventsandbleedingrisk.MethodsAtotalof319AMIpatientswereenrolledinthisprospectiveclinicalstudy.Theplateletinhibitionratesinadenosine5'-diphosphate(ADP)pathwaysweremeasuredbyathrombelastography(TEG)system.ThepatientswithclopidogrelresistanceweredividedintoTicagrelorsequentialtherapygroup(ticagrelorfor3monthsandclopidogrelfor9months,n=143)andClopidogrelgroup(clopidogrelfor12months,n=176).Theriskofmajoradversecardiacevents(MACE)andthesafetyendpointsat1-yearfollow-upwereanalyzed.ResultsTheratesofstentthrombosis(ST)(2.1%vs.8.0%,P=0.017)orMI(2.8%vs.10.2%,P=0.009)werelowerintheticagrelorsequentialtherapygroupthanintheclopidogrelgroup.Dyspneawasmoreoftenintheticagrelorsequentialtherapygroupthanintheclopidogrelgroup(17.5%vs.4.5%,P<0.001).Nosignificantdifferenceintherateofmajorbleedingwasfoundbetweenthegroups(3.4%vs.3.9%,P=0.528).ConclusionsInAMIpatientswithhyporesponsivenesstoclobidogrelticagrelorsequentialtherapygroupsignificantlydecreasedtheratesofSTandMIwithoutincreasedriskofmajorbleedingascomparedwithclopidolgrel.

简介：ObjectivesToexploretheprotectiveeffectofirbesartan(Irb)undertheinterferencewithangiotensinⅡ(AngⅡ)onABCA1.MethodsElectronmicroscopywasusedtodetectthemorphousoffoamcells.TheexpressionofABCA1mRNAanditsproteinweredeterminedbyRT-PCRandWesternblotting,respectively.Thevarianceofcellularcholesterolcontentwasmeasuredbyzymochemistryvia-fluorospectrophotometer.ResultsApositivefacilitativeeffectofAngⅡontheformationoffoamcellswasobserved.TotalcholesterolwasincreasedsignificantlybyAngⅡ,theexpressionofABCA1wasdown-regulatedobviouslybyAngⅡ;IrbcouldprotectABCA1againstthelesionofAngⅡ;TotalcellularcholesterolcontentwasreducedsignificantlyinIrb+AngⅡgroup;However,considerablealterationaboutthecholesterolcontentandtheexpressionofABCA1werenotobservedinIrbgroupwithoutincubationwithAngⅡ.ConclusionsIrbcouldprotectABCA1againstthelesionofAngⅡ,whichmaycontributetoitsanti-atheroscleroticproperties.

简介：ObjectivesToinvestigatetheeffectofGαq/11signalingpathwayandATP-sensitivepotassiumchannel(KATPchannel)onischemicpreconditioning(IPC)protectioninrathearts.MethodsTwoseriesofexperimentswereperformedinWistarrathearts.Inthefirstseriesofexperiment,ischemicpreconditioningwasinducedbyleftanteriordescendingocclusion(three,5minepisodesseparatedby5minofreperfusion),ischemia-reperfusioninjurywasinducedby30mincoronaryarteryocclusionfollowedby90minreperfusion.Hemodynamics,infarctsizeandscoresofventriculararrhythmiasweremeasured.TheexpressionofGαq/11proteinintheheartwasmeasuredbyWesternblotanalysisinthesecondseries.ResultsIschemicpreconditioningratsshoweddecreasedinfarctsizeandscoresofventriculararrhythmiavsnon-IPcontrolrats.TheeffectofIPCwassignificantlyattenuatedbyglibenclamide(1mg/kg,ip),anonselectiveKATPchannelinhibitor.IPCcausedasignificantincreaseintheexpressionofGαq/11protein.ConclusionsActivationsofGαq/11signalpathwayandKATPchannelplayedsignificantrolesintheclassicalcardioprotectionofischemicprecon-ditioningratheartandmightbeanimportantmechanismofsignaltransductionpathwayduringtheischemicpreconditioning.

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简介：目的观察不同剂量的ATP终止不同年龄组阵发性室上性心动过速（PSVT）时复律时间、长间歇及其副作用。方法以静脉给药，将56例随机分为青年组（A组）、中年组（B组）和老年组（C组）。结果56例PS—VT全部中止．各组复律时间无差异。结论C组长间歇延长、副作用和剂量有关，C组用量宜从最低剂量开始。

简介：缺血性脑损伤后的病理改变主要表现为：脑缺血后梗死病灶中心的梗死区、围绕梗死区的半暗带区及外围的周边区域。多年来缺血性脑血管病的治疗策略主要是通过改善血流动力学或其他手段阻断半暗带细胞后续的系列级联病理变化，如能量代谢异常、电解质紊乱、自由基大量生成、核酸内切酶激活等。从而保护或抑制半暗带组织神经元的损伤，改善病情。近年来，随着分子生物学技术的迅猛发展，人们发现缺血性脑损伤后细胞的死亡和功能障碍往往伴随或源自特定基因表达的变化。因此，基因治疗有可能足缺血性脑损伤治疗新途径和新策略的希望所在。

简介：脑缺血的基因治疗是颇具前景的治疗手段，以病毒为载体的基因治疗的有效性和安全性关系到最终治疗的成败。重组腺相关病毒（recombinantadeno-associatedvirus，rAAV）载体作为目前安全性最好的病毒载体系统，在动物中枢神经系统（centralnervoussysterm，CNS）中已进行了有效转导。随着国内外研究的日趋深入，rAAV在脑缺血基因治疗中的应用也越来越倍受瞩目。现就其进展予以综述。

简介：成人高胆固醇血症的检测、评价和治疗专题组的第三次报告(AdultTreatmentPanelⅢ,ATPⅢ)制定了国家胆固醇教育计划(NECP)新的胭固醇检测和处理临床指南。ATPⅢ在保持对冠心病患者强化治疗关注的同时,其主要新的特点是