ECG心电图的解读.ppt

ELECTROCARDIOGRAMTheFirstAffiliatedHospitalofShantouUniversityMedicalCollege卢成志

TheStandard12-leadElectrocardiogramHowtomeasureeachwave:amplitudeduration25mm/s

ELECTROCARDIOGRAMECGrecordsthechangingpotentialofthefieldimpartedbytheheart.ECGdosenotrecorddirectlytheelectricalactivityoftheheart.ECGrecordtheelectricalactivityoftheheartfromthebodysurface.

插入离子通道图片

Electricalbasisandtheory

Electricalbasisandtheorydepolarizationdipolerepolarization

Electricalbasisandtheory

Electricalbasisandtheoryq

ClinicalelectrocardiolopyelementaryknowledgeVectorResultantvectorLoop

Electricalbasisandtheory

TheStandard12-leadElectrocardiogramSAnodeBachmannAVnodeHisbundleLeftandrightbranchofbundlePukinjefiber

TheStandard12-leadElectrocardiogramPWaveP-RintervalQRSComplexSTsegmentTWaveQ-Tinterval

TheStandard12-leadElectrocardiogram

——RWaveform

LeadSystemoftheECGLimbleadsEinthoventrigoneHexaxialsystem

LeadSystemoftheECGChestleads

Chestleads

LeadSystemoftheECG

.Ⅱ.ECGEVALUATION

TheStandard12-leadElectrocardiogramHowtomeasureeachwave:amplitudeduration25mm/s

HowtocalculatetheheartrateHeartRate=60/R-Rduration

MeanQRSaxis

CardiacRotation

.Ⅲ.NORMALECG⒈PWave⒉P-RInterval⒊QRScomplex⒋Jpoint⒌STSegment⒍TWave⒎Q-TInterval⒏UWave

.Ⅲ.NOMALECG

——PWave⑴form：I、II、avF、V4-6?⑵duration：0.12s⑶amplitude:Limbleads0.25mV,Chestleads0.20mV.

.Ⅲ.NOMALECG

——P-RIntervalduration：0.12s~0.20s.

.Ⅲ.NOMALECG

——QRScomplex

⑴duration:0.06~0.10s.⑵formandamplitude.⑶Rpeaktime⑷QWave

.Ⅲ.NOMALECGJpointSTSegmentTWaveQ-TIntervalUWave

IV.TheAbnormalECGAtrialandVentricularhypertrophy

AtrialandVentricularhypertrophy

(一）atrialenlargmentLeftatrialenlargementRightatrialenlargement:

AtrialandVentricularhypertrophy

(一）leftVentricularenlargmentQRSvoltage:①RinV5,62.5mV,②RV5+SV13.5or4.0mV,③RI1.5mV,Ri