EKG Kaiser Study Guide

EKGbmKaiserbmStudybmGui
de
1. Cardiac
StudybmbmConduction
online bmPathwaybmSystem:bmSAbmnode>bmAVbmnode>bmBundlebmofbm
bmatbmhttps://quizlet.com/_abmrda
His>bmLeftbmandbmRightbmbundlebmbranches>bmPurkinjiebmfibers
2. Pacemakersbmofbmthebmheart:bmeNatural:bmSAbmNodebm=bm60-
100bmbeats/minutebmeBackup:bmAVbmNodebm=bm40-60bmbeats/minute
eBackup:bmPurkinjebmFibersbm(ventricles)bm=bm20-40bmbeats/minute
3. SAbmNode:bm•bmIntrinsicbmPacemakerbmofbmthebmheart
• Ratebm60-100bmbeats/min
• RAbm(RightbmAtrium),bmclosebmtobmSVCbm(SuperiorbmVenabmCava)
• BloodbmsupplybmfrombmRCAbm(RightbmCoronarybmArtery)bm&bmLCAbm(Left nary Arter
Coro
bmbm

4. Interatrial/InternodalbmTracts:bmTransmitsbmimpulsesbmfrombmthebm y) debmtobmthebm
SAbmnobmnodebmthroughbmthebmRAbm&bmLA AV


5. AVbmnode:bm•bmSlowsbmconductionbm(40-60bmbeats/min)
• PhysiologicbmdelaybmallowsbmatrialbmkickbmonbmfloorbmofbmRAbmnearbmtricuspid
lve bmva




6. BundlebmofbmHis:bmBundlebmofbmcardiacbmmusclebmfibersbmthatbmcondu lectrical
ctsbmthebmebmimpulsesbmfrombmthebmAVbmnodebminbmthebmrightbmatriumbmtob thebmventricle
mthebmseptumbmbetweenbmandbmthenbmtobmthebmleftbmandbmrightbmventricle s

s.

scicles)
7. bundlebmbranches:bmRightbmandbmLeftbm(Leftbmanteriorbm&bmLeftbmposterior bmfa




8. PurkinjiebmFibers:bmFibersbmfrombmBundlebmBranchesbmimbeddedbmintoentricle
bmthebmvbmwall

s.


9. DepolarizationbmvsbmRepolarization:bmDepolarizationbm-
bmelectricalbmexcitationbmofbmthebmcellbmmembrane,bmnormallybmfollowedbmbybmmecha

nicalbmcontraction
Repolarizationbm-
bmreturnbmofbmcellbmmembranebmtobmitsbmrestingbmstate,bmnormallybmfollowedbmbybmmecha

calbmrelaxation
10. Electricalbmandbmmechanicalbmactivitybmofbmthebmheart:bmeThe bmheartbmhasbmtwo
bmactivitiesbmthatbmarebmperformedbmrhythmically:bmelectricalbmactivitybmfollowedbmbybm
1
bm/bm
31

, EKGbmKaiserbmStudybmGui
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mechanical bmactivitybmeElectricalbmactivitybmalwaysbmprecedesbmmechanicalbmactivity
Studybmonlinebmatbmhttps://quizlet.com/_abmrda




2
bm/bm
31

, EKGbmKaiserbmStudybmGui
de
eItbmisbmpossible atbmto
Studybmonlinebmbm bmhavebmelectricalbmactivitybmwithoutbmmechanicalbmresponse
https://quizlet.com/_abmrda
bmeAlwaysbmcheckbmthebmpatientbm-bmDobmNotbmDependbmonbmthebmMachine!!!

11. Measurementbmofbmthebmboxesbminbmthebmekg:bmeAbmstandardbmECGbmisbmprinte
dbmatbm25mmbmperbmsecondbmorbm25bmsmallbmsquaresbmperbmsecond.bmSincebmonebmsec
ondbmdividedbmbybm25bmsmallbmboxes,bmthenbmeachbm1bmmmbmboxbm=bm0.04bmseconds.bm
Thebmlargerbmboxesbmindicatedbmbybmthebmheavierbmlinesbmarebmequalbmtobm0.20bmseco
nds.
eVoltagebmisbmmeasuredbmalongbmthebmverticalbmaxisbmandbmisbmexpressedbminbmmillivolt
sbm(mV).bmThebmstandardbmcalibrationbmisbmthatbmabm1bmmVbmsignalbmproducesbmabm10-
mmbmdeflectionbm(0.1bmmV=1mm).bmSimplybmputbm10bmsmallbmsquaresbmverticallybmisbm
equalbmtobm1bmmillivolt
12. EKGbmwaveformsbmandbmintervals:bmePbmwavebm-
bmroundedbmwithbmuprightbmdeflectionbminbmleadbmII,bmatrialbmdepolarization

ePRbminterval-bmdelaybm@bmAVbmjunction
• measurebmfrombmbeginningbmofbmPbmwavebmtobmbeginningbmofbmQRS
• Normalbmdurationbm0.12bm-bm0.20bmsecondsbm•

Sbmwavebm-bmNegativebmdeflectionbmfollowingbmthebmR-wave


eQRSbmcomplexbm-bmmultiplebmcomponents,bmVentricularbmdepolarization,bm-bm0.06bm-0.1
• Qbmwavebm-bmfirstbmnegativebmdeflectionbmafterbmPbmwavebmRbmwave
• PositivebmdeflectionbmafterbmthebmQ

eJbmpointbm-
bmmarksbmwherebmthebmQRSbmcomplexbmendsbmandbmthebmSTbmsegmentbmbegins

eSTbmsegmentbm-
bmnormallybmisoelectricbmlinebmbetweenbmQRSbmandbmthebmbeginningbmofbmthebmTbmwave

eQTbmintervalbm-
bmbeginningbmofbmthebmQRSbmcomplexbmtobmthebmendbmofbmthebmTbmwave;bmchangesbmwithbmh

artbmrate,bmusuallybmhalfbmofbmthebmRbmtobmRbminterval.bmbeginningbmofbmventbmactivationb
hroughbmVentricularbmdepolarization.bm0.44bm-0.48bm(Ratebmdependent)
eTbmwavebm-
bmfollowsbmthebmQRS;bmtypically,bmlargerbmthanbmthebmPbmwavebmandbmslightlybmasymmetric

Ventricularbmrepolarization
eUbmwavebm-
bmnotbmusuallybmseen,bmmaybmbebmduebmtobmhypokalemiabmorbmdigitalisbmtoxicity



IsoelectricbmLinebm-Nobmperceivedbmelectricalbmcurrent
13. indicationbmofbmabmflatbmlinebmatbmanybmtimebminbmthebmdurationbmofbmabmseries
3
bm/bm
31

, EKGbmKaiserbmStudybmGui
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ofbmwaves:
bm bmin-bmdicatesbmnobmelectricalbmactivitybmatbmthatbmparticularbmmoment
Studybmonlinebmatbmhttps://quizlet.com/_abmrda
14. NursingbmResponsibilitiesbmwhenbmtheresbmchangesbminbmECGbmrhythm:bmePri
nt, bmmea-bmsure,bminterpretbmandbmpostbmrhythmbmstripsbmperbmunitbmstandard.
eGetbmabm12bmleadbmECGbmforbmanybmrhythmbmchanges.




4
bm/bm
31