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LeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VolLeftVentricular
Pressure-VolumeLoopsPressure-volumeloopplotsLVpressureagainstLVvolumethroughonecompletecardiaccycleFactorsaffecting:PreloadAfterloadContractilityIHSSValvularproblemsLeftVentricular
Pressure-VoluLeft-Ventricular-Pressur教學(xué)講解課件LeftVentricular
Pressure-VolumeLoopsKNOW:WhenthemitralandaorticvalvesareopenandclosedduringeachphaseWhensystolebegins(B)andends(D)Whendiastolebegins(D)andends(B)DiastolicfillingoccursbetweenpointsAandBEjectionoccursbetweenpointsCandDLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcutechangesinpreloadIncreasedpreload:FillingincreasesSVincreasesDecreasedpreload:FillingdecreasesSVdecreases*NOTE:theventricleemptiestothesameend-systolicvolumeaftereitheranincreaseordecreaseinpreloadLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsCardiactamponadeUniqueloopLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcutechangesinAfterloadIncreasedafterload:VentricleemptieslesscompletelySVdecreasesIncreaseinBP(shiftsupandright)Decreasedafterload:VentricleemptiesmorecompletelySVincreasesDecreaseinBP(shiftsdownandleft)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAlteredcontractilityIncreasedcontractility:VentricleemptiesmorecompletelySVincreasesBPincreases (shiftsupandleft)Decreasedcontractility:VentricleemptieslesscompletelySVdecreasesBPdecreases(shiftsdownandright)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsSummaryofconcepts:Alterationsinpreload:end-diastolicvolumeincreasesordecreases,buttheamountofbloodinthechamberatend-systoledoesnotchangeStrokevolumefalls:resultofeitheranincreaseinafterloadoradecreaseincontractility,thevolumeofbloodintheLVchamberincreases(chamberdilates)Strokevolumeincreases:resultofadecreaseinafterloadoranincreaseincontractility,thevolumeofbloodintheLVchamberdecreases(chambershrinks)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsIHSSUNIQUEP-Vloopisshiftedtosmallervolumesandlargerpressures(duetooutflowtractobstruction)ONLYIHSScausesthistypeofcombinedshiftLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsChronicAorticStenosis (increasedafterload)ConcentrichypertrophypermitstheLVtogenerategreaterpressureLVvolumesremainaboutnormalP-VloopshiftsupwardLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsMitralStenosis (Decreasedpreload)LVfillingisdiminishedP-VloopreflectsadecreasedpreloadEmptyingisaboutnormalLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcuteAorticInsufficiency(regurgitation)VolumeintheLVchamberincreasesduringearlydiastoleP-VloopissmallNoisovolemicrelaxationLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsChronicAorticInsufficiency(Eccentrichypertrophy)LVchamberdilatesP-VloopislargebecausetheSVislargeNoisovolemicrelaxationLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsBeabletoidentifyaP-VloopthatshowsaorticinsufficiencyBeabletoidentifywhethertheloopreflectsacuteorchronicaorticinsufficiencyLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcuteMitralRegurgitationP-VloopissmallNoisovolemiccontractionLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsChronicMitralRegurgitationLVhypertrophies(eccentric)LVchamberdilatesP-VloopislargebecausetheSVislargeNoisovolemiccontractionLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsA=NormalB=MitralstenosisC=AorticstenosisD=mitralregurgitation(chronic)E=aorticregurgitation(chronic)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VolLeftVentricular
Pressure-VolumeLoopsPressure-volumeloopplotsLVpressureagainstLVvolumethroughonecompletecardiaccycleFactorsaffecting:PreloadAfterloadContractilityIHSSValvularproblemsLeftVentricular
Pressure-VoluLeft-Ventricular-Pressur教學(xué)講解課件LeftVentricular
Pressure-VolumeLoopsKNOW:WhenthemitralandaorticvalvesareopenandclosedduringeachphaseWhensystolebegins(B)andends(D)Whendiastolebegins(D)andends(B)DiastolicfillingoccursbetweenpointsAandBEjectionoccursbetweenpointsCandDLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcutechangesinpreloadIncreasedpreload:FillingincreasesSVincreasesDecreasedpreload:FillingdecreasesSVdecreases*NOTE:theventricleemptiestothesameend-systolicvolumeaftereitheranincreaseordecreaseinpreloadLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsCardiactamponadeUniqueloopLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcutechangesinAfterloadIncreasedafterload:VentricleemptieslesscompletelySVdecreasesIncreaseinBP(shiftsupandright)Decreasedafterload:VentricleemptiesmorecompletelySVincreasesDecreaseinBP(shiftsdownandleft)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAlteredcontractilityIncreasedcontractility:VentricleemptiesmorecompletelySVincreasesBPincreases (shiftsupandleft)Decreasedcontractility:VentricleemptieslesscompletelySVdecreasesBPdecreases(shiftsdownandright)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsSummaryofconcepts:Alterationsinpreload:end-diastolicvolumeincreasesordecreases,buttheamountofbloodinthechamberatend-systoledoesnotchangeStrokevolumefalls:resultofeitheranincreaseinafterloadoradecreaseincontractility,thevolumeofbloodintheLVchamberincreases(chamberdilates)Strokevolumeincreases:resultofadecreaseinafterloadoranincreaseincontractility,thevolumeofbloodintheLVchamberdecreases(chambershrinks)LeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsIHSSUNIQUEP-Vloopisshiftedtosmallervolumesandlargerpressures(duetooutflowtractobstruction)ONLYIHSScausesthistypeofcombinedshiftLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsChronicAorticStenosis (increasedafterload)ConcentrichypertrophypermitstheLVtogenerategreaterpressureLVvolumesremainaboutnormalP-VloopshiftsupwardLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsMitralStenosis (Decreasedpreload)LVfillingisdiminishedP-VloopreflectsadecreasedpreloadEmptyingisaboutnormalLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsAcuteAorticInsufficiency(regurgitation)VolumeintheLVchamberincreasesduringearlydiastoleP-VloopissmallNoisovolemicrelaxationLeftVentricular
Pressure-VoluLeftVentricular
Pressure-VolumeLoopsChronicAorticInsufficiency(Eccentrichypertrophy)LVchamberdilatesP-Vl
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