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:ObjectivesToevaluatetheeffectsofn-3fattyacidsonthecoronaryheartdiseasepatients.MethodsFromSeptember2007toMarch2008,60patientswithcoronaryheartdiseasewererandomlyassignedton-3fattyacidsgroup(groupN)andcontrolgroup(groupC).BothgroupsreceivedstandardcoronaryarterydiseasesecondarypreventiontreatmentandgroupNalsoreceivedeicosapentaenoicacid(EPA)1.8gplusdocosahexaenoicacid(DHA)1.2gperdayfor12weeks.Plasmatriacylglycerols,totalcholesterol,low-densitylipoproteincholesterol(LDL-C),high-densitylipoproteincholesterol(HDL-C)andbloodpressureweremeasuredbeforeandafterthestudy.ResultsPlasmatriacylglycerols,bloodpressureandLDL-ClevelwereloweringroupNaftern-3fattyacidstreatmentwhilenochangewasfoundingroupC(P<0.05).HDL-Clevelslightlyincreasedandtotalcholesterollevelslightlydecreasedaftern-3fattyacidsbutbothchangewerenotsignificant(P>0.05).ConclusionsN-3fattyacidshavebeneficialeffectsonthecoronaryarterydiseasepatients.
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:目的:研究射频消融术(RFCA)对血凝状态及肌钙蛋白I(cTnI)含量的影响.方法:60例行RFCA的病人分别测定电生理检查术(EPS)术前、后,消融术前,消融术后即刻,4、12、24小时D-二聚体(DD),血小板α颗粒膜糖蛋白(GMP-140),cTnI含量.结果:血清DD,GMP-140水平在EPS及RFCA后升高,而cTnI水平仅在RFCA后升高.峰值cTnI与峰值DD,GMP-140呈直线正相关(r=0.48,0.39,P<0.001,<0.005).结论:RFCA可损伤心肌并改变血凝状态,心肌损伤可诱发血小板聚集,促进血栓形成.
简介:随机对照试验(RCT)被公认为评价医疗干预措施效果的金标准[1,2]。但在研究罕见病、慢性疾病及涉及伦理学或长期疗效观察等问题上,随机对照试验的可行性较低,而队列研究、病例对照研究等非随机对照研究(NRSI)更易达到研究目标,并且也是评估干预疗效的重要方法[3-6]。且一些学者在对RCT和观察性研究进行对比后,认为一个大样本的试验设计完善的非随机研究比一个小样本的设计不佳的RCT更加可取[7,8]。目前,许多评价观察性研究方法学质量的工具已被系统评价采用[9,10],而Newcastle-Ottawa[11]和Downs-Black[12]工具是其中应用最广泛的两种。虽然两者都具有完善的方法学的条目清单,但是每一个条目同时涉及内部有效性和外部有效性,并且缺乏综合性的手册。
简介:ObjectivesToinvestigatetheeffectandmechanismofendovaseularbraehytherapywith^192IronexpressionoftypeIcollagen,metalloproteinases-1(MMP-1)andthetissueinhibitor(TIMP-1)afterangioplasty.MethodsRestenotiemodelofdomesticmieroswinewasemployedandtheiliaearterieswererandomizedtoradiationgroup(n=12),whichweretreatedwith20-25Gyof^192Ir,andnon-radiationgroup(n=36)afterangioplasty.Thetargetvesselswereharvestedintheendof3monthsand6monthsafterangioplasty.Im-munohistochemistryandinsituhybridizationwereusedtodetectproteinsoftypeIcollagen,MMP-1andTIMP-1,andmRNAexpressionoftypeIcollagen.ResultsTheproteinandmRNAoftypeIcollagen,theratiosofTIMP-1/MMP-1weresignificantlylowerinradiationgroupthaninnon-radiationgroup(P<0.05or0.01).ThepeakoftranscriptionoftypeIcollagenmRNAwasat6monthsand3monthsinnon-radiationgroupandradiationgrouprespectively.ConclusionsEndovascularbrachytherapywith^192IrmightmodifythemetabolismofextracellularmatrixafterangioplastybyinhibitingthesynthesisoftypeIcollagenandtheactivitiesofMMP-1andTIMP-1.
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:ObjectivesToevaluateantihypertensiveefficiencyandsafetyofanewdomesticofL-&N-typeCa^2+antagonist-eilnidipinewithimidaprilasapositivecontrol.MethodsAfter2weeks'placebowashingout,22patientsweretreatedwitheilnidipine5mgdailyand27patientsweretreatedwithimidapril5mgdaily.4weekslater,ifpatient'ssittingdiastolicbloodpressureisover90mmHg,his/herdosagewasdoubledforanother4weeks,theothersmeasuringupremainedtheirdosageunchangedforanother4weeks.Bloodpressure,heartrate,bloodandurineroutineexamination,serumglucose,serumchemicalexaminationincludingtotalcholesterol,triglyceride,HDL,LDL,transaminase,creatineetcandsidereactionswererecordedbeforeandafterthetrial.Datawereanalyzedstatistically.ResultsAfter8weeks'treatment,bloodpressurewassignificantlydecreased(P<0.05)inbothgroups,andthetwomedicineshadsimilarantihypertensiveeffects.Furthermore,thereducingofheartratewasstatisticallysignificantcomparedwithbaseline(P<0.01)inthecilnidipinegroup,butnotintheimidaprilgroup.Thenegativechronotropiceffectofcilnidipinehadlittleeffectoncontinuingthetherapy.Therewerenochangesonbloodandurineroutineexaminationandserumlipid,serumglucose,creatine,transaminaseandetcinbothgroups.Theirsidereactionsweremildandwell-tolerated.ConclusionsCilnidipinehasacon-vincingantihypertensiveeffectsimilartothatofimi-dapril.Especiallycilnidipinemaybeadministeredtopatientswithrelativelymildtachycardia.
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。