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1、ELECTROCARDIOGRAMTheFirstAffiliatedHospitalofShantouUniversityMedicalCollege盧成志TheStandard12-leadElectrocardiogramHowtomeasureeachwave:amplitudeduration25mm/sELECTROCARDIOGRAMECGrecordsthechangingpotentialofthefieldimpartedbytheheart.ECGdosenotrecorddirectlytheelectrica
2、lactivityoftheheart.ECGrecordtheelectricalactivityoftheheartfromthebodysurface.插入離子通道圖片ElectricalbasisandtheoryElectricalbasisandtheorydepolarizationdipolerepolarizationElectricalbasisandtheoryElectricalbasisandtheoryqClinicalelectrocardiolopyelementaryknowledgeVectorRe
3、sultantvectorLoopElectricalbasisandtheoryTheStandard12-leadElectrocardiogramSAnodeBachmannAVnodeHisbundleLeftandrightbranchofbundlePukinjefiberTheStandard12-leadElectrocardiogramPWaveP-RintervalQRSComplexSTsegmentTWaveQ-TintervalTheStandard12-leadElectrocardiogram ——RWa
4、veformLeadSystemoftheECGLimbleadsEinthoventrigoneHexaxialsystemLeadSystemoftheECGChestleadsChestleadsLeadSystemoftheECG.Ⅱ.ECGEVALUATIONTheStandard12-leadElectrocardiogramHowtomeasureeachwave:amplitudeduration25mm/sHowtocalculatetheheartrateHeartRate=60/R-RdurationMeanQR
5、SaxisCardiacRotation.Ⅲ.NORMALECG⒈PWave⒉P-RInterval⒊QRScomplex⒋Jpoint⒌STSegment⒍TWave⒎Q-TInterval⒏UWave.Ⅲ.NOMALECG ——PWave⑴form：I、II、avF、V4-6?⑵duration：<0.12s⑶amplitude:Limbleads<0.25mV,Chestleads<0.20mV..Ⅲ.NOMALECG ——P-RIntervalduration：0.12s~0.20s..Ⅲ.NOMALECG ——QRScomp
6、lex⑴duration:0.06~0.10s.⑵formandamplitude.⑶Rpeaktime⑷QWave.Ⅲ.NOMALECGJpointSTSegmentTWaveQ-TIntervalUWaveIV.TheAbnormalECGAtrialandVentricularhypertrophyAtrialandVentricularhypertrophy(一）atrialenlargmentLeftatrialenlargementRightatrialenlargement:AtrialandVentricularhyp
7、ertrophy(一）leftVentricularenlargmentQRSvoltage:①RinV5,6>2.5mV,②RV5+SV1>3.5or4.0mV,③RI>1.5mV,RinaVL>1.2mV,aVF>2.0mV,SinV1?2.4mV,④RI+SIII?2.5mV.leftaxisdeviationQRSduration>0.09ms.STsegmentandTwaveleftVentricularenlargmentAtrialandVentricularhypertrophy(二）RightVentricular
8、enlargment①V1leadR/S>1,V5leadR/S<1,②Rv1+Sv5>1.05mV.③rightaxisdeviation>+90°.④ST-TchangeRightVentricularenlargm
