ECGs Made Easy (7th Edition) by Barbara Aehlert PDF | ECG Interpretation Guide

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ECGsgMadegEasyg7thgEditiongbygBarbaragAehlertgTestgBankg
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TablegofgContents:g

Chapterg1.gAnatomyg&gPhysiologyg

Chapterg2.gBasicgElectrophysiologyg

Chapterg3.gSinusgMechanismsg

Chapterg4.gAtrialgRhythmsg

Chapterg5.gJunctionalgRhythmsg

Chapterg6.gVentriculargRhythmsg

Chapterg7.gAtrioventriculargBlocksg

Chapterg8.gPacemakergRhythmsg

Chapterg9.gIntroductiongtogtheg12-LeadgECGg

Chapterg10.gPost-Testg
Chapterg01:gAnatomygandgPhysiologyg
Aehlert:gECGsgMadegEasy,g7thgEditiong g



g
MULTIPLEgCHOICEg

1. Thegapexgofgthegheartgisgformedgbygtheg .g
a. tipgofgthegleftgventricleg
b. tipgofgthegrightgatriumg
c. rightgatriumgandgrightgventricleg
d. leftgatriumgandgleftgventricleg
ANS:gAg
Thegheart’sgapex,gorglowergportion,gisgformedgbygthegtipgofgthegleftgventricle.gThegapexgliesgju
stgabovegthegdiaphragm,gbetweengthegfifthgandgsixthgribs,gingthegmidclaviculargline.g

OBJ:gIdentifygthegsurfacesgofgthegheart.g
g
2. Thegleftgatriumgreceivesgbloodgfromgtheg .g
a. pulmonarygveinsg
b. aortag



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c. pulmonarygarteriesg
d. inferiorgvenagcavag
ANS:gAg
Thegleftgatriumgreceivesgfreshlygoxygenatedgbloodgfromgtheglungsgviagthegrightgandgleftgpulmo
narygveins.g

OBJ:gIdentifygandgdescribegthegchambersgofgthegheartgandgthegvesselsgthatgentergorgleavegeach.g
g
3. Theganteriorgsurfacegofgthegheartgconsistsgprimarilygofgtheg .ga.gleftgatriumg
b. rightgatriumg
c. leftgventricleg
d. rightgventricleg
ANS:gDg
Thegfrontg(anterior)gsurfacegofgthegheartgliesgbehindgthegsternumgandgcostalgcartilages.gItgisgfor
medgbygportionsgofgthegrightgatriumgandgthegleftgandgrightgventricles.gHowever,gbecausegthegh
eartgisgtiltedgslightlygtowardgthegleftgingthegchest,gthegrightgventriclegisgthegareagofgthegheartgth
atgliesgmostgdirectlygbehindgthegsternum.g

OBJ:gIdentifygthegsurfacesgofgthegheart.g
g
4. Bloodgpressuregisgdeterminedgbyg multipliedgbyg .g
a. strokegvolume;gheartgrateg
b. heartgrate;gcardiacgoutputg
c. cardiacgoutput;gperipheralgvasculargresistanceg
d. strokegvolume;gperipheralgvasculargresistanceg
ANS:gCg
Bloodgpressuregisgequalgtogcardiacgoutputgmultipliedgbygperipheralgvasculargresistance.g
OBJ:gIdentifygandgexplaingthegcomponentsgofgbloodgpressuregandgcardiacgoutput.g

5. Thegrightgatriumgreceivesgvenousgbloodgfromgtheghead,gneck,gandgthoraxgviagtheg
,gfromgthegremaindergofgthegbodygviagtheg ,gandgfromgthegheartgviagtheg .g
a. coronarygsinus;gsuperiorgvenagcava;ginferiorgvenagcavag
b. superiorgvenagcava;gcoronarygsinus;ginferiorgvenagcavag
c. inferiorgvenagcava;gsuperiorgvenagcava;gcoronarygsinusg
d. superiorgvenagcava;ginferiorgvenagcava;gcoronarygsinusg
ANS:gDg
Thegrightgatriumgreceivesgbloodglowgingoxygengfromgthegsuperiorgvenagcava,gwhichgcarriesgbl
oodgfromgthegheadgandguppergextremities;gtheginferiorgvenagcava,gwhichgcarriesgbloodgfromgth
eglowergbody;gandgthegcoronarygsinus,gwhichgisgtheglargestgveingthatgdrainsgthegheart.g

OBJ:gIdentifygandgdescribegthegchambersgofgthegheartgandgthegvesselsgthatgentergorgleavegeach.g
g
6. Thegheartgisgdividedgintog chambersgbutgfunctionsgasgag -sidedgpump.ga.gtwo;gfourg
b. three;gtwog
c. four;gtwog
d. four;gthreeg



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ANS:gCg
Thegheartghasgfourgchambers:gtwogatriagandgtwogventricles.gThegrightgandgleftgsidesgofgtheghea
rtgaregseparatedgbyganginternalgwallgofgconnectivegtissuegcalledgagseptum.gTheginteratrialgseptu
mgseparatesgthegrightgandgleftgatria.gTheginterventriculargseptumgseparatesgthegrightgandgleftgv
entricles.gThegseptagseparategthegheartgintogtwogfunctionalgpumps.gThegrightgatriumgandgrightg
ventriclegmakegupgonegpump.gThegleftgatriumgandgleftgventriclegmakegupgthegother.g

OBJ:gIdentifygandgdescribegthegchambersgofgthegheartgandgthegvesselsgthatgentergorgleavegeach.g
g
7. Stimulationgofgalpha1greceptorsgresultsging .g
a. increasedgheartgrateg
b. peripheralgvasoconstrictiong
c. constrictiongofgbronchialgsmoothgmuscleg
d. increasedgforcegofgmyocardialgcontractiong
ANS:gBg
Alpha1greceptorsgaregfoundgingthegeyes,gbloodgvessels,gbladder,gandgmalegreproductivegorgans
.gStimulationgofgalpha1greceptorgsitesgresultsgingconstriction.g

OBJ:gComparegandgcontrastgthegeffectsgofgsympatheticgandgparasympatheticgstimulationgofgtheghea
rt.g
g
8. Whichgsidegofgthegheartgisgaglow-
pressuregsystemgthatgpumpsgvenousgbloodgtogtheglungs?ga.gLeftg
b.gRightg
ANS:gBg
Thegjobgofgthegrightgsidegofgthegheartgisgtogpumpgunoxygenatedgbloodgtogandgthroughgtheglung
sgtogthegleftgsidegofgthegheart.gThisgisgcalledgthegpulmonarygcirculation.gThegrightgsidegofgtheg
heartgisgaglow-pressuregsystem.g
OBJ:gIdentifygandgdescribegthegchambersgofgthegheartgandgthegvesselsgthatgentergorgleavegeach.g

9. Whichgsidegofgthegheartgisgaghigh-
pressuregsystemgthatgpumpsgarterialgbloodgtogthegsystemicgcirculation?g
a. Leftg
b. Rightg
ANS:gAg
Thegleftgsidegofgthegheartgisgaghigh-
pressuregpump.gThegjobgofgthegleftgheartgisgtogreceivegoxygenatedgbloodgandgpumpgitgoutgtogth
egrestgofgthegbody.gThisgisgcalledgthegsystemicgcirculation.gThegleftgventriclegisgaghigh-
pressuregchamber.gItsgwallgisgmuchgthickergthangthegrightgventricleg(thegrightgventriclegisg3gtog
5gmmgthick;gthegleftgventriclegisg13gtog15gmmgthick).gThisgisgbecausegthegleftgventriclegmustgo
vercomegaglotgofgpressuregandgresistancegfromgthegarteriesgandgcontractgforcefullygingordergtog
pumpgbloodgoutgtogthegbody.g

OBJ:gIdentifygandgdescribegthegchambersgofgthegheartgandgthegvesselsgthatgentergorgleavegeach.g

10. Thegthick,gmusculargmiddleglayergofgthegheartgwallgthatgcontainsgthegatrialgandgventriculargmu
sclegfibersgnecessarygforgcontractiongisgtheg .g


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