高血压英文ppt精品课件atrialand ventricular

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1、AtrialandVentricularEnlargementChapter6WebSiteInstructionhttp://www.madsci.com/manu/ekg_hypr.htmhttp://library.med.utah.edu/kw/ecg/ecg_outline/Lesson7/index.htmlhttp://library.med.utah.edu/kw/ecg/ecg_outline/Lesson8/index.htmlCardiacEnlargementDilationstretchede

2、.g.congestiveheartfailureHypertrophyincreasesizeofheartmusclefiberse.g.aorticstenosisCardiacEnlargementIncreaseamount/areaofcardiactissueHowwouldthisaffectdepolarization?HowcouldthataffectanECG?RightAtrialAbnormalityOverloadoftherightatriadilationhypertrophyalso

3、knownasPpulmonaleHowwouldthischangethePwave?RightAtrialAbnormalityRightAtrialAbnormalityNormalPwaveislessthan2.5mmtalland0.12secondswide.Withrightatrialhypertrophy,Pwavesaretypicallytallerthan2.5mmbutnotwiderthan0.12sec.RightAtrialAbnormalityCriteriaTallPwavesin

4、leadII(orIII,aVFandsometimesV1)RightAtrialAbnormalityCauses:PulmonarydiseaseCongenitalheartdiseaseLeftAtrialAbnormalityAlsoknownasPmitraleLeftatrianormallydepolarizesaftertherightatria.HowwouldthisaffectthePwave?wider;leftatrialenlargementshouldprolongthePwave>0

5、.12sec.LeftAtrialAbnormalityLeftAtrialAbnormalityII:widePwaveV1:negativePwaveis“1boxwide,1boxdeep”AtrialEnlargementLeftAtrialAbnormalityLeadII(andI)showwidePwaves(secondhumpduetodelayeddepolarizationoftheleftatrium)(Pmitrale:mitralvalvedisease)V1mayshowabi-phasi

6、cPwave1boxwide,1boxdeep(biphasicsincerightatriaisanteriortotheleftatria)LeftAtrialAbnormalityCauses:Valvedisease(mitralandaortic)HypertensiveheartdiseaseCardiomyopathiesCoronaryarterydiseaseVentricularHypertrophyFrontalPlaneTransversePlane12LeadsV1?V1?V6?V6?Fig.

7、4-6NormalQRSNormalQRSRightVentricularHypertrophyWhatdoyouthinkwillhappentotheECGwithventricularhypertrophy?RightVentricularHypertrophyConsiderrightventricularhypertrophyandV1HowwouldV1bedifferent?NormalHypertrophyRightVentricularHypertrophyRightVentricularHypert

8、rophyCriteriaInV1,RwaveisgreaterthantheSwave-or-RinV1greaterthan7mmRightaxisdeviationInV1,Twaveinversion(reasonunknown)SwavesinV5andV6RightVentricularHypertrophyCause