简介:目的研究孤立性心房颤动(房颤)患者血小板功能改变。探讨房颤引起血栓前状态的原因。方法用放射免疫分析法对21例孤立性阵发性房颤(A组)、28例孤立性持续性房颤(B组)患者分别于房颤发作及终止后1周测定外周静脉血浆血小板α颗粒膜蛋白-140(GMP-140)、血栓素B2(TXB2)、6-酮-前列腺素F1α(6-K-PGF1α)浓度,并与27例风湿性心脏病二尖瓣狭窄伴持续性房颤(C组)、32例阵发性室上性心动过速患者(D组)及与20例健康体检者(对照组)相比较。结果A、B组惠者房颤发作时及C组患者GMP-140、TXB2和TXB2/6-K-PGF1α比A组患者房颤终止后1周和D组及对照组明显上升。A组患者血浆GMP-140、TXB2浓度及TXB2/6-K-PGF1α与房颤发作时间呈正相关,而与患者年龄、性别及左心房内径等临床参数无关。结论无论是器质性心脏病房颤还是孤立性房颤,无论是阵发性房颤还是持续性房颤都存在血小板的激活和血管内皮细胞功能损伤。
简介:目的探讨甲型H1N1流感患者心脏损害的特点。方法回顾性研究分析2009年7月至2010年1月期间确诊为甲型H1N1流感患者172例的临床资料,所有患者根据病情分为轻症组,重症组,危重症组,并收集非甲型H1N1流感患者21例作为对照。大部分患者接受分子生物学检测磷酸肌酸激酶,磷酸肌酸激酶同工酶,高敏C反应蛋白,并接受胸部X线摄片检查,计算心胸比。结果甲型H1N1流感多发生于青壮年患者,轻症患者较重症患者更年轻(P<0.05)。在危重症患者中,磷酸肌酸激酶,磷酸肌酸激酶同工酶,高敏C反应蛋白和心胸比均较其他组高(P<0.05或P<0.01)。1例死于心肌损害。结论与既往研究相符,2009甲型H1N1流感可以导致心肌损害,特别是在危重症患者中心肌损害较显著,从而将导致心脏扩大等损害,导致死亡率升高。
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:目的探讨老年非瓣膜性心房颤动(NVAF)患者ECGf波特点与血栓栓塞危险性的关系。方法选择老年NVAF患者69例,根据是否合并血栓栓塞事件,将患者分为栓塞事件组(23例)和无栓塞事件组(46例)。描记ECGV1导联,测量f波的振幅、f波时限和f-f间期,并经胸超声心动图检查,进行相关分析及logistis回归分析。结果栓塞事件组患者f波振幅较无栓塞事件组低(0.076±0.018)mVvs(0.092±0.033)mV,差异有统计学意义(P〈0.05);f-f间期较无栓塞事件组短(0.115±0.009)svs(0.126±0.016)s,差异有统计学意义(P〈0.05),两组f波时限比较无显著差异(P〉0.05);相关分析显示f波振幅与年龄呈负相关(r=-0.29,P〈0.05),而与左心房、LVEF均无显著相关性(P〉0.05);logistic回归分析显示f波振幅减低是老年NVAF患者血栓栓塞事件的独立危险因素。结论ECGf波特点有助于评估老年NVAF患者血栓栓塞危险性。
简介:目的研究心脏瓣膜置换术后口服华法林抗凝治疗的初始剂量的个体化区别,分析CYP4F2rs2108622基因型对口服华法林初始剂量的影响。方法入选广东省心血管病研究所2000年至2008年瓣膜置换术后口服华法林抗凝治疗的患者,回顾患者一般资料、临床资料、用药剂量、国际标准化比值(internationalnormalizedratio,INR)和进入治疗窗时间(INR≥1.8)、超出治疗窗时间(INR〉3.5)。结果本次研究共有769例患者资料齐全,民族均为中国汉族,其中CYP4F2基因型为CC型的患者占65.8%(n=506),CT型28.7%(n=221),TT型5.5%(n=42)。按基因型不同分别分析进入治疗窗(INR〉1.8)和过度抗凝(INR〉3.5)的时间发现,不同基因型之间比较,差异有统计学意义(P〈0.05)。结论CYP4F2基因型多态性对于口服华法林初始剂量存在一定的影响。
简介:T1mappingusingcardiovascularmagneticresonance(CMR)introducesnoveltechniquesformyocardialtissuecharacterizationtodetectandquantifydiseaseprocessesoccurringatthemicroscopiclevel.EventhoughT1mappinghaslimitedspatialresolution,cellularandmolecularchangesoccurringwithineachvoxelcanaffecttheaggregateT1signalrenderingthemquantifiable.TheestimatedT1-basedparametersquantifiedona“map”demonstratethespatiallocalizationofthesechangeswherebyeachpixelexpressesthequantitativevalueofthatparameter.Thisquantificationpermitsdetectionofdiffusediseaseevenifitisnotdirectlyvisible.Ratherthanrelyingonnonspecificfunctionalmeasures,T1mappingfocusesonintrinsicchangesofmyocardialcompositionthatadvancesunderstandingaboutspecificdiseasepathways.Thesechangesinmyocardialtissuecompositioninformdiagnosisandprognosis.T1mappingencompassestwokeyparameters:native(i.e.,precontrast)T1andextracellularvolumefraction(ECV)derivedfromadditionalpostcontrastT1andbloodT1measurements.Theseadvancesintroducenewtoolstodetectfocalanddiffusemyocardialderangementsoccurringincardiacdiseasethatcanbeotherwisedifficulttodetect.T1andECVmappingfosterprecisionmedicineandpersonalizedcare,promisingtoimprovepatientoutcomesthroughtargetedtherapy.CapitalizingontheopportunitiesintroducedbyT1mappingandECVrequiresfurtherinvestigation.
简介:BackgroundCoronarymicroembolization(CME)ischaracterizedbydistalmicrovascularocclusion.However,theinflammatorymechanismsandtherapeutictargetsofCMEarelargelyunknown.MethodsAtotalof11GuangxiBamaminiatureswinesweredividedintotwogroups:sham(n=5)andCME(n=6).MicrosphereswereinjectedintotheleftanteriordescendingarteryoftheCMEgrouptomakeananimalmodelofCME.TheexpressionsofmicroRNA-146a(miR-146a)andIRAK1,TRAF6,andAUF1inthemyocardiumweredetectedbyqPCR.ResultsIntheCMEgroup,microspheres,microinfarction,andinflammatorycellinfiltrationwerefoundunderanopticalmicroscope.TheexpressionlevelsofmiR-146awerelowinbothgroups.AfterCME,theexpressionlevelsofIRAK1,TRAF6,andAUF1intheCMEgroupwereupregulatedcomparedwiththoseintheshamgroup(P<0.01;P<0.05;P<0.05,respectively).ConclusionsAUF1,IRAK1andTRAF6,butnotmiR-146a,couldbeinvolved,inmyocardiuminflammationfollowingCME.
简介:BackgroundEssentialhypertension(EH)hasbecomethemostcommonchronicnon-infectiousepidemicandisoneofthemostcommonriskfactorsforthedamagetoheart,brain,kidneyandotherorgans.TheserumlevelsofICAM-1,IGF-1andIL-8playimportantrolesinthepathogenesisofEH.MethodsInthemedicalcheck-upcenteroftheAffiliatedHospitalofQingdaoUniversityMedicalCollege,sixtynormaloffspringwithafamilyhistoryofEHwererandomlyrecruitedintotwogroups:30offspringwithafatherormothersufferingfromEHassingle-parentgroup,and30offspringwithbothparentssufferingfromEHasdouble-parentgroup,andanother30normaloffspringwhoseparentsdidnotsufferfromEHascontrolgroup.TheserumlevelsofICAM-1,IGF-1andIL-8weredeterminedbyenzyme-linkedimmunosorbentassay(ELISA).ResultTheserumlevelsofICAM-1,IGF-1andIL-8weresignificantlyhigherinbothsingle-parentgroupanddouble-parentgroupthaninthecontrolgroup(P<0.05),andtheserumlevelsofICAM-1,IGF-1andIL-8werehigherinthedouble-parentgroupthaninthesingle-parentgroup(P<0.05).TheserumlevelsofICAM-1,IGF-1andIL-8werepositivelycorrelatedwiththeseverityofbloodpressureelevation(r=0.375,r=0.465,r=0.326,P<0.05,P<0.01,P<0.05respectively).ConclusionsDuetotheinfluenceofheredity,theseruminflammatoryfactorcontentsinnormaloffspringwithEHfamilyhistorymayincreasebeforebloodpressurerise.DetectionofseruminflammatoryfactorsinhealthyoffspringwithafamilyhistoryofEHcouldpredictoccurrenceofhypertension,andprovideamorereliablebasisfortheprimarypreventionofhypertension.
简介:目的:探讨血清转化生长因子(TGF-β1)和胰岛素样生长因子(IGF-1)水平对冠心病患者心功能的影响.方法:选择因胸痛住院患者88例分为急性心肌梗死(AMI)组、心绞痛(AP)组和对照组,填调查表,入院择日行选择性冠状动脉造影术,术前采股动脉血,以ABC双抗体夹心ELISA法检测血清TGF-β1和IGF-1浓度,入院2周内完成超声心动图,所有资料用SPSS10.0软件处理.结果:AMI患者与AP患者相比,血清TGF-β1浓度较低(P<0.05),IGF-1血清浓度较低(P<0.001);冠心病患者血清IGF-1水平与EF(P<0.05)和FS(P<0.02)正相关.结论:TGF-β1和IGF-1对冠心病患者具有某种保护作用,其中IGF-1能保护冠心病患者的心功能.