简介:目的探讨心电图活动平板试验(TET)阳性患者Q-T离散度(QTd)变化的意义。方法93例受试者根据TET分为阳性组(A组)38例,男/女=13/25,年龄55±8岁和阴性组(B组)55例,男/女=26/29,比较两组TET前后QTd、QTcd的变化。结果运动前QTd、QTcdA组分别为41±15ms和46±18ms,B组分别(38±14)ms和(46±16)ms,两组比较无显著差异。达次极量运动时A组QTd为(51±17)ms与运动前比较有显著性差异(P<0.05),QTcd为(79±28)ms,与运动前比较有非常显著性差异(P<0.01),B组QTd、QTcd分别为(37±16)ms和(51±19)ms,与运动前比较无显著性差异。两组运动后QTd、QTcd比较有非常显著性差异(P<0.01)。结论TET阳性与QTd之间有良好的临床相关性。可反映运动负荷造成的心肌缺血。
简介:<正>先天性长Q-T间期综合征的治疗有多种选择方法[1],包括β受体阻滞剂、左侧交感神经节切除、人工心脏起搏、ICD、基因治疗等。而国人对
简介:目的分析多种非心肌梗死性Q波、ST-T改变的机制及鉴别点.方法回顾分析非心肌梗死住院患者心电图呈心肌梗死样改变的临床资料及心电图特征.结果非心肌梗死住院患者心电图呈心肌梗死样改变39例,急性胰腺炎6例,病毒性心肌炎8例,肥厚性心肌病5例,主动脉夹层3例,心脏原发性肿瘤3例,急性肺栓塞4例,早期复极征3例,Brugada征2例,预激综合征1例,肺源性心脏病2例,胸部外伤2例.心电图异常包括ST段改变29例(74.4%)、异常Q波18例(46.2%)、T波改变28例(71.8%).结论异常Q波、ST-T改变等心电图改变非急性心肌梗死独有特征,多种疾病也可出现心电图异常.结合临床,密切观察病情变化及必要的辅助检查对相关疾病的判断显得更为重要.
简介:目的评价35~60岁工人、农民人群中ST-T异常改变与心脑血管病事件的关系.方法分析2123例人群的调查和随访资料(除外心绞痛、心梗、脑卒中),心电图按标准化方法(同步12导)ST段上移在肢体导联>0.1mV,V2~3导联>0.2~0.3mV,下移>0.05mV为异常,T波低平<同导联R/10或T波倒置为异常.结果ST-T异常的发病率在农村人群>城市人群,女性>男性,T波异常的改变明显多于ST段异常,ST-T异常组与心脑血管病事件的发病率为97.5/万.结论在冠心病发病率较低的我国人群,ST-T异常同样增加冠心病事件和脑血管病事件发病危险性.
简介:ObjectivesTostudythephenotypeofaChinaLQTfamilyandinvestigatetherelationshipofphenotypeandgene.MethodsTheclinicalmaterialswereanalyzedandgenemutationswerescreenedbysequencing.ResultsAdistinctivebiphasicTwavepatternwasshownintheleftprecordialleadsofallpatients.TheLQT2relatedHERGgeneAla561Valmutationwasfound.ConclusionsAprolongedQTintervalaccompaniedbiphasicTwaveindicatesHERGmutation.
简介:BackgroundApolipoprotein(apo)A-Visanovelmemberoftheapolipoproteinclusterinvolvedintriacylglycerol(TG)homeostasis.IthasreportedthatAPOA5genepolymorphismsiscorrelatedwitharterioscleroticdiseases.However,ThisassociationisunknownonChinesepatientswithatheroscleroticcerebralinfarction.ThepresentstudyaimedtoelucidatetherelationshipofAPOA5-1131T>Candarterioscleroticcerebralinfarction(ACI)aswellasthelevelsofserumlipids.MethodsPolymerasechainreaction-restrictionfragmentslengthpolymorphisms(PCR-RFLP)analysis,enzymaticandimmunoturbidimetrymethodswereusedtomeasure-1131T>Cgenotype,allelefrequencyaswellasplasmalipidlevelof90ACIpatientsand221healthysubjectsofHanChinese.ResultsInACIgroup,thelevelofTGinalleleCcarrierswashigherthanthatofnon-Ccarriers(P<0.05).ThefrequencyofalleleCinACIgroupwashigherthaninhealthygroup(χ~2=5.568,P=0.018).Exceptsex,ageandBMI,thelevelsoftotalcholesterol(TC),triglycerides(TG),highdensitylipoproteincholesterol(HDL-C),low-densitylipoproteincholesterol(LDL-C),APOA1andAPOBinACIgroupdistinctivelywerehigherthanthoseinhealthygroup.ConclusionTheAPOA5-1131alleleCisassociatedwiththehighlevelofTGinACIpatients,whichisprobablylinkedwithACIdangerofChineseHan.
简介:目的探讨高敏肌钙蛋白T(hsTnT)轻度升高在胸痛患者鉴别诊断中的作用。方法2010年1月1日至2010年9月30日就诊于我院的胸痛患者,hsTnT水平在0.001~0.030ng/mL者,根据冠脉造影结果分为冠心病组和非冠心病组。hs-TnT检查采用美国罗氏公司的cobase601自动检测仪检测。结果共入选45例患者,两组患者年龄、性别、肌酐清除率无显著性差异,冠心病组hsTnT较非冠心病组升高,分别为(0.014±0.009)ng/mL和(0.007±0.005)ng/mL,P=0.004。冠心病组患者hsTnT与冠脉Gensini积分相关分析:相关系数=0.418,P=0.034。结论对于疑诊冠心病的胸痛患者,低浓度的hsTnT升高有助于冠心病的诊断,且hsTnT的值可能与冠脉病变的范围和程度有关。
简介:目的:探讨心肌钙蛋白T(cTnT)对不稳定心绞痛(UAP)危险分层的临床价值.方法:用酶联免疫法测定80例UAP患者入院当天、第2天、第3天血浆cTnT水平,据cTnT≥0.1ng/ml或<0.1ng/ml将患者分为cTnT升高组和正常组,观察住院期间UAP胸痛发作时ST-T变化以及急性心肌梗死(AMI)的发生率.结果:在80例UAP中cTnT升高者24例(30%);正常者56例(70%);cTnT升高者24例中发生AMI3例(12.5%),其中死亡1例,cTnT正常者无1例发生AMI或死亡;cTnT升高组胸痛发作时的心电图ST-T改变发生率100%(24/24)高于正常组的0%(0/56)(P<0.01).结论:cTnT测定对判断UAP在短期内发生AMI和心性死亡预测价值,可作为UAP危险度分层指标.
简介:目的检测扩张型心肌病(DCM)者T波峰-末(1协)间期及Tpe离散度(Tped)与室性心律失常发生的相关性预测价值。方法对149例DCM者按是否伴有室性心律失常而分为室性心律失常组(A组)和非室性心律失常组(B组)。分别测量其入院后24h内首次心电图的R—R间距,Q—T间期,Qrp(Q为自QRS波群的起点至正向T波的顶点或负向的T波最低点的距离),并测算出T波顶.最至T波终点的距离,即Tpe(P—e=QT—QTp),以及Tped(即:最长Wpe与最短Tpe之差)。然后进行比较分析。结果在A组Tpe较B组明显延长(140.938±22.196ms〉93.833±25.91ms)。A组Tped也较B组明显延长(60.313±9.327ms〉34.083±12.866ms)。结论在DCM者中A组Tpe及Tped均较B组明显延长,表明A组跨壁复极离散度增大,与室性心律失常的发生有显著的相关性,可能具有预测室性心律失常发生的价值。
简介:Arrhythmogenicrightventriculardysplasia/cardiomyopathy(ARVD/C)ischaracterizedbyfibro-fattyreplacementoftherightventricle.However,thefeasibilityandsignificanceofmyocardialfibrosisdetec-tedbydelayedenhancement(DE)using3.0Tmagneticresonanceimaging(MRI)in.ARVD/Cisseldomlystudied.MethodsTwenty-sevenconsecutivepatientswereprospectivelyevaluatedforARVD/C.Magneticreso-nanceimagingwasperformedona3.0Tscanner.Tenminutesafterintravenousadministrationof0.2mmol/kgofgadodiamide,DE-MRIwasobtained.DiagnosisofARVD/CwasbasedupontheTaskForcecriteriaandin-cludedMRIfindings.ResultsSeventeen(59%)of27patientsmettheTaskForcecriteriaforARVD/C.Rightven-tricleDEwasfoundinall(100%)ARVD/Cpatientscomparedwithnone(0%)ofthe10patientswithoutARVD/C(P<0.001).AdditionalleftventricularDEwasfoundin8/17ARVD/Cpatientswhilewithoutleftventricularmor-phologicalandfunctionalabnormalitiesdetectedbyechocardiographyorMRI.ConclusionsDEusing3.0TMRIcouldeffectivelydetectmyocardialfibrosisintherightandleftventricularmyocardiuminARVD/Cpatients.DetectionofmyocardialfibrosismayhaveanimportantclinicalsignificanceinARVD/Cdiagnosis.Histologicalleftventriclein-volvementmaybeeasilymissedbyechocardiography.
简介:BackgroundTheregulationoft-PAgeneistheessenceandcoreofthrombosis.Therefore,thepresentstudyaimedtopreparenanot-PAgenecoatedstentandtoobserveitseffectoncoronarystentthrombosisindogs.MethodsHighlyexpressedt-PAgeneplasmidwasconstructedandalbuminnanot-PAgenecoatingstentwasprepared.Themajorbranchvesselsofdogcoronaryarterywerepre-expandedwitha3.0mm×20balloonwith8-10atmosphericpressure.10dogsofthecontrolgroupwereimplantedwithbaremetalstent;while12dogsoftheexperimentalgroupwereimplantedwithnanot-PAgenecoatingstent.Bothgroupswerenotgivenanti-coagulationtreatments.Bloodsamplesweretakenfort-PAandD-dimerbeforetheoperation,at1,2,4and8weeksafteroperation.Pathologicalanalysisfoundthrombosisinthecavityandthehyperplasiaoftheintima.t-PAexpressionwasdetectedbyimmunohistochemicalindirectly,andthethicknessoftheintimaofthesectioncrosswasdirectlymeasuredbymorphometry.Liver,heart,kidneysandlungweretakenforpathologicalobservation.ResultsAllexperimentalanimalssurvivedatpostoperative8weeks.Vascularstentthrombosiswasseenin10casesofthecontrolgroupwiththethrombosisrateof100%;whilewasseenin2casesamong12casesoftheexperimentalgroupwiththethrombosisratewas16.67%(P=0.00087).Immunohistochemicalstainingshowedthatthepositivet-PAgenetransfectionoftheexperimentalgroupwasmainlydistributedonthesurfaceofhyperplasiaintima,andvascularwallt-PAexpressionofthecontrolgroupwasnegative.Positivet-PAsignalwasnotfoundintheliver,heart,kidneysandlung.ConclusionNanot-PAgenevectorcoatingstentcaneffectivelyexpresst-PAinvascularwallandeffectivelypreventsstentthrombosis.