简介:BackgroundAlthoughmiRNAshavebeenshowntoassociatewithavarietyofdiseases,whethermiRNAsinmonocyteassociateheartfailure(HF)hasbeennotwellstudied.MethodsEightpatientswithischemicHF(IHF),8patientswithnon-ischemicHF(NIHF)and8healthyvolunteerswererecruited.Clinicalcharacteristicsofallparticipantswerecollected.PeripheralbloodsamplesweredrawnforanalysisofmiRNAexpressioninmonocytes.ResultsAllparticipantsweremaleandtheparticipantsinIHFgroupwereolderandhadhigherpercentageofsmokeranddiabetesmellitusthanintheothertwogroups(P<0.05).SerumlevelsofcreatinineandNT-proBNPweresignificantlyhigherinIHFpatientscomparedtotheothertwogroups(P<0.05).MoreparticipantsinIHFgroupweretreatedwithACEI/ARB,beta-blockerandstatins.ParticipantswithNYHAgradeIIIaccountedfor62.5%inIHFgroup,whileparticipantswithNYHAgradeIVaccountedfor87.5%inNIHFgroup.Thelevelsof11miRNAsinmonocytesweresignificantlyhigherintheIHFgroup,andthelevelsof7miRNAsweresignificantlyincreasedintheNIHFgroup.OtherdifferencesinmiRNAslevelsbetweenIHFandNIHFgroupswerealsoobserved.ConclusionourpresentstudyrevealedthattherearesubstantialdifferencesinmiR-NAsbetweenHFpatientsandhealthyvolunteer.
简介:患者男,25岁.因反复阵发性心悸、头晕就诊.T36.8℃,P92次/min,BP110/70mmHg.心肺体征(-).临床诊断:阵发性室上性心动过速.阵发性心悸发作时,心动过速呈突发突止特点.图为V1导联:P波直立,为异位P波.p-P及R-R间期呈长短交替,分别为0.42s及0.35s,互差0.07s,平均0.385s,频率156次/min.R-P间期固定.为起源于交接区心动过速.QRS波呈rsr'型.P及R形态一致.上述现象为交接区异位起搏点分别经快、慢2条径路同步、传导速度比例恒定(R-P间期恒定)的顺传、逆传所致(见梯形图).P-及R波形态一致,系2条径路分别到达心室及心房前,均经共同通道到达心室及心房之故.
简介:ObjectivesToevaluatetheeffectofdifferentstylesofcoronaryheartdisease(CHD),differentregionsofacutemyocardialinfarction(AMI),itsriskfactorsandbranchesofcoronarystenosisonleftventricularremodelinganddysfunctionbyapplyingechocardiography.Methods251patientswithCHDand96patientswithoutCHD(NoCHD)wereverifiedbyselectivecoronaryangiography.CHDpatientsweredividedintostableanginapectoris(SAP)26,unstableanginapectoris(UAP)53,acutemyocardialinfarction(AMI)140andoldmyocardialinfarction(OMI)30basedonclinicalsituation,cTnT,cardiacenzymeandEGG.AMIpatientswerefurtherdividedintosubgroupsincludingacuteanteriormyocardialinfarct(Aa,n=53),acuteinferiormyocardialinfarction(Ai,n,=54)andAa+Ai(n=33)basedonECG.Cardiacparameters:end-diastolicinterventricularseptumthickness(IVSd),end-diastolicleftventricularinternaldiameter(LVd),leftventricularmass(LM),end-diastolicleftventricularvolume(EDV),end-systolicleftventricularvolume(ESV)andleftventricularejectionfraction(LVEF)weremeasuredbyACUSON128XP/10echocardiography.MultipleslinearregressionanalyseswereperformedtoteststatisticalassociationsbetweenLVEFandtheinvolvedbranchesofcoronarystenosis,bloodpressure,lipids,glucoseandetcafteronsetofmyocardialinfarction.ResultsEDVandESVwereincreasedandLVEFdecreasedonpatientswithAMI,OMIandUAP(P<0.05-0.0001).LMwasmainlyincreasedinpatientswithOMI(P<0.01)andLVdwasmainlyenlargedinpatientswithAMI.EFwassignificantlydecreasedandEDV,ESV,LMandLVdwereremarkablyincreasedinAMIpatientswithAaandAa+Ai.WiththemultiplelinearregressionanalysesbySPSSsoftware,wefoundthatLVEFwasnegativelycorrelatedtotheinvolvedbranchesofcoronarystenosisaswellastosystolicbloodpressureafteronsetofmyocardialinfarctionwhiletherewasnosignificantcorrelationbetweenLVEFandotherfactors.LVEFwassignificantlydecreased,and
简介:ObjectivesTocomparethedifferentpatternsofcoronaryarterycalcification(CAC)inacuteandchroniccoronarysyndromesutilizingelectronbeamcomputedtomography.BackgroundPathologic,angiographic,andintracoronaryultrasoundstudiesrevealedsharpdifferencesintheplaquemorphologybetweenpatientswithacuteversuschroniccoronarysyndromes.Whethertherearedifferentpatternsofcoronaryarterycalcificationinpatientswithstableanginapectoris(SAP)andinthosewithunstableanginapectoris(UAP)oracutemyocardialinfarction(AMI),however,remainsunclear.MethodsTwohundredandsixty-fourpatients,including67withSAP,94withUAPand103withAMIwerestudiedwithelectronbeamcomputedtomographyforanalysisofcoronaryarterycalcificationandwithselectivecoronaryangiographyfordeterminationofatheroscleroticlesions.CACprevalenceandcalciumscorewerecomparedamongthreegroups,andrelationofCACtotheseverityofatheroscleroticdiseaseintheSAPandUAP
简介:Objectives:Apoptosisisrecognizedasanimportantmechanismincontrast-inducednephropathy(CIN).Cordycepssinensis(CS),atime-honoredtonicfoodandherbalmedicineinChina,canimprovethemicrocirculation,increasethetolerancetoischemiainpatientswithmicrocirculatorydisorders.AsCShasbeenfoundtoberenoprotectiveandanti-apoptoticinmultiplekidneyinjuries,wehypothesizedthatCSwouldpreventCIN.TheobjectiveofthisresearchistostudythemechanismofCSontubularepithelialcellapoptosisindiabeticCINrats.
简介:目的研究妊娠中晚期心电图短P—R间期产生机制以及对胎儿的影响。方法对32例妊娠中晚期发现短P—R间期者(观察组)和30例P—R间期正常的中晚期孕妇(对照组)进行24h动态心电图(DCG)及胎儿心电图(FECG)检查;对观察组进行输氧一周后复查常规心电图(ECG)、FECG、及产后3个月复查ECG。结果观察组心率变异(HRV)较正常对照组明显降低,有显著性差异(P〈0.001、P〈0.005及P〈0.01);观察组输氧后短P—R间期恢复正常,FECG前后变化不大。结论妊娠中晚期的P—R间期缩短与需氧量增加、自主神经功能失调、交感神经占优势相关.可作为中晚期妊娠者自主神经功能失衡的客观指标;对胎儿影响不大。
简介:BackgroundInthisstudy,weaimedtoevaluatetheimpactofabnormalglucose,lipidandCystatin-ConthevirtualPvectorcharacteristics,whichhaven’tbeenreportedinpreviousstudies.Methods204ofnon-diabetesmellitus(NDM),130ofDM(type2)and39ofimpairedglucosetolerance(IGT)patientswereconsecutivelyandretrospectivelyrecruited.Weselectedaone-minutelengthofelectrocardiogramat4AMforanalysis.Afteraseriesofcalculatingalgorisms,weobtainedthevirtualplanarPvectorparameters.ResultsTherewerenosignificantdifferencesinFPV,FPA,RSPV,RSPA,HPVandHPAgroups.Afteradjustingconfoundingfactors,theregressioncoefficients(RC)wereestimatedasfollow:forFPV,femalegender(RC-0.21,P=0.02),triglyceride(RC-0.09,P<0.01),RVOT(RC0.03,P=0.02);forRSPV,femalegender(RC-0.21,P<0.01),triglyceride(RC-0.10,P<0.01),averageheartrate(RC0.01,P=0.02);forHPV,triglyceride(RC-0.08,P<0.001),LDL(RC-0.19,P<0.01),ApoB(RC0.67,P<0.01);forRSPA,Btypeofblood(RC-22.06,P=0.02),Cystatin-C(RC-72.79,P=0.02),thicknessofinterventricularseptum(RC3.70,P=0.01).Cystatin-CwassuggestedasacurerelatedtoRSPA,andthecut-offpointwas1.6mg/L.TherewerenosignificantriskfactorsassociatedwithFPAandHPA.TherewasnodifferenceinvirtualPvectoramongDM,IGTandNDMgroups.ConclusionIncreasedlevelsoflipidandCystatin-CsignificantlyimpactthecharacteristicsofvirtualPvector,whereasglucosedoesnot.Thesechangesmaycomefromahigherlowvoltageatrialareaandabnormalorientationofatrialdepolarization.
简介:BackgroundIntra-aorticballoonpump(IABP)hasbeenwidelyusedatpresent.Wecanuseitatdifferentstagesofperioperativeperiodinoff-pumpcoronaryarterybypassgrafting(CABG).However,whentouseditwasseldomconfirmed.MethodsFromJanuary2008toJune2012,the89coronaryheartdisease(CHD)patientsacceptedimplantationofIABPatdifferentstagesofoff-pumpCABG,preoperativeandpostoperativeventricularsystolicfunction,leftventricularremodelingsituationandthechangesofmyocardialenzymeswereevaluated.ResultsAllthepatientshadleftheartinsufficiencyandmultivesseldisease.TheirpostoperativeleftventricularsystolicfunctionandventricularremodelingweresignificantlyimprovedwhilemyocardialenzymesdecreasedwithpreoperativeinterventionalimplantationofIABP.Theperioperativemortalitywas7.86%(7/89).NopatientshadcomplicationofIABP.ConclusionEarlierIABPimplantationatpreoperationisusefultoimproveheartfunction,improvethetolerabilityofsurgery,reducetheincidenceofpostoperativelowcardiacoutputsyndrome(LCOS)anddecreasethemortality.
简介:目的探讨慢性肺心病合并冠心病P波离散度(Pd)的临床价值。方法观察26例阵发性心房颤动者(A组)及26例健康者(B组)12导联同步体表心电图P波最大时间及离散度。结果A组P波最大时间及离散度均较B组增大(P〈0.01),P波最大时间〉110ms、Pd〉40ms以及两者相结合对阵发性心房颤动预测的敏感性分别为89%、86%、76%,特异性分别为80%、85%、89%。结论Pd是预测心房颤动的一个体表心电图新指标。
简介:目的观察微小RNA(microRNA,miR)-142-3p对血管紧张素Ⅱ(angiotensinⅡ,AngⅡ)诱导的心肌肥厚中线粒体功能的影响。方法我们使用Sprague-Dawley(SD)大鼠的乳鼠心肌细胞,细胞培养后分成4组:空白组;AngII组;miRnc+AngII组;miR-142-3pmimic+AngII组。分别往细胞中转染相同浓度的miR-142-3p和miRnc质粒6h,实时定量聚合酶链反应(real-timepolymerasechainreaction,rt-PCR)检测实验组miR-142-3pmRNA表达增多,提示细胞质粒转染成功,再用10-6mol/L浓度的AngII诱导细胞48h,使用线粒体Mito-RedTracker处理细胞30min,共聚焦显微镜观察细胞中线粒体密度的变化;使用流式细胞仪检测线粒体膜电位变化。结果与空白组相比,AngII组的线粒体膜电位减低(n=3,P<0.01);与AngⅡ+miRnc组相比,AngⅡ+miR-142-3p组的线粒体膜电位增加(n=3,P<0.01)。与空白组相比,AngⅡ组的线粒体荧光数量减低(n=3,P<0.01);与AngⅡ+miRnc组相比,AngⅡ+miR-142-3p组的线粒体荧光数量增加(n=3,P<0.01)。结论在AngⅡ诱导心肌肥大过程中miR-142-3p对心肌线粒体具有保护作用。