高血压英文ppt精品课件diseases of the

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1、DiseasesoftheHeartMajorDeterminantsofDiseaseMostheartdiseaseistheresultofatheroscleroticobstructionofthecoronaryarteriesCongestiveheartfailureismechanicalfailureofthehearttoejectblooddeliveredtoitMetabolicorautoimmunediseasemaycauseheartmuscleorvalvedamageHighbloodpressureacceleratesathe

2、rosclerosis&mostothercardiacdiseaseCardiacvalvesareone-waygatesforbloodflow&aresusceptibletoobstruction®urgitationCardiacvalvesaresusceptibletoinfectionAbnormalembryonicdevelopmentoftheheartproducessignificantcardiacanatomicmalformationsAbnormalheartbeatpatterns(arrhythmias)cancauseca

3、rdiacdysfunctionordeath&cancomplicateanyheartconditionArrhythmiasMechanicallyinefficientCOdecreasesPotentiallyfatalCausedbymyocardialischemiaMIelectrolyteimbalancestresscaffeinedrugs,especiallystimulantscongenitaldefectsintheelectricalnetworkNormalrhythmis~70beats/minbradycardiais<60beat

4、s/mintachycardiais>100beats/minPrematureatrialcontractionsextraatrialbeatscommoninhealthypeoplenotharmfulduetostresslackofsleepcaffeinesomedrugsAtrialflutterrapid,regularatrialrhythm~300beats/minAtrialfibrillationrapid,irregularatrialrhythmAVnodefiltersoutalotdecreasedCOEachyearheartdise

5、aseaccountsforabout1/3ofdeathsintheUS,mostofwhichareassociatedwithcoronaryarteryatherosclerosis.Ifcerebrovasculardisease,vascularcomplicationsofdiabetes,&othervasculardiseasesareincluded,thefigureisover40%.Afterage40thelifetimeriskfordevelopingsymptomaticcoronaryarterydiseaseis50%inmen&4

6、0%inwomen.HeartBlockAtrialsignalisdelayed&cannotcrossintotheventricleCommoncauseisanatomicabnormalitiesCanalsobecausedbydigitalis1stdegreedelayofsignalbutnomissedventricularbeats2nddegreedelaylongenoughtocausemissedventricularbeats3rddegreetotalblockofatrialsignaldecreasedCOPrematurevent

7、ricularcontractionsoccurinhealthypeoplechestpalpitations&anxietyVentriculartachycardiaspontaneous,regularbeatingat>120beats/mindecreasedCOVentricularfibrillationextremelyrapid&irregularnegligibleCOCongestiveHeartFailureCHFHeartunabletoejectvolumeofblooddeliveredtoitEndpoi