BASIC ECG INTERPRETATION QUESTIONS AND CORRECT ANSWERS

BASIC ECG INTERPRETATION
QUESTIONS AND CORRECT ANSWERS

QuestionA21A2ofA24
MatchA2theA2propertyA2ofA2theA2cardiacA2conductionA2systemA2withA2itsA2description.
PropertyA2ofA2theA2cellA2thatA2allowsA2itA2toA2acceptA2initiationA2ofA2stimulation
-Excitability
PropertyA2thatA2movesA2electricalA2impulseA2alongA2aA2membrane
-Conductivity
AbilityA2ofA2heartA2muscleA2toA2respondA2mechanicallyA2toA2anA2impulse
-Contractility
AbilityA2ofA2heartA2muscleA2toA2initiateA2anA2impulse,A2beginA2stimulation
-AutomaticityA2-A2Ans--

QuestionA22A2ofA24
ListA2inA2orderA2theA2pathwayA2ofA2theA2normalA2cardiacA2impulseA2startingA2atA2theA2SAA2
node.
TheA2impulseA2causesA2theA2atriaA2toA2contract.A2
TheA2impulseA2travelsA2fromA2theA2AVA2nodeA2throughA2theA2bundleA2ofA2His.A2
TheA2impulseA2dividesA2intoA2theA2leftA2andA2rightA2bundleA2branches.A2
TheA2impulseA2reachesA2theA2PurkinjeA2fibers.A2
TheA2ventriclesA2contract.A2-A2Ans--

QuestionA23A2ofA24
AnA2increaseA2inA2theA2rateA2ofA2cardiacA2impulseA2initiationA2isA2linkedA2toA2stimulationA2o
fA2whichA2component?
PurkinjeA2system
ElectrolyteA2system
SympatheticA2nervousA2system
ParasympatheticA2nervousA2systemA2-A2Ans--SympatheticA2nervousA2system
TheA2sympatheticA2nervousA2systemA2isA2responsibleA2forA2increasingA2theA2rateA2ofA2car
diacA2impulseA2initiationA2atA2theA2SAA2node.A2ItA2alsoA2assistsA2withA2nodeA2impulseA2con
ductionA2andA2cardiacA2contractility.

QuestionA24A2ofA24
WhichA2electrolytesA2playA2keyA2rolesA2inA2polarizationA2ofA2theA2heartA2cells?
SodiumA2andA2potassium
PotassiumA2andA2calcium
PotassiumA2andA2glucose
SodiumA2andA2magnesiumA2-A2Ans--SodiumA2andA2potassium
TheA2electrolytesA2sodiumA2andA2potassiumA2areA2partnersA2inA2cardiacA2function.A2AA2hig
herA2sodiumA2levelA2outsideA2theA2cellA2allowsA2forA2aA2highA2potassiumA2andA2lowA2sodiu
mA2levelA2insideA2theA2cell.A2PotassiumA2insideA2theA2cellA2isA2requiredA2forA2theA2conducti
onA2ofA2impulsesA2toA2achieveA2aA2polarizedA2state.

, QuestionA21A2ofA24
WhichA2waveA2onA2theA2ECGA2tracingA2willA2provideA2theA2nurseA2moreA2informationA2abo
utA2atrialA2depolarization?
A
B
C
DA2-A2Ans--B
TheA2PA2waveA2demonstratesA2theA2initialA2firingA2ofA2theA2SAA2node.A2TheA2PA2waveA2can
A2displayA2asA2positiveA2(upright),A2negativeA2(inverted),A2orA2biphasicA2(bothA2positiveA2a
ndA2negative).

QuestionA22A2ofA24
AA2patientA2asksA2theA2nurse,A2"WhyA2doA2IA2needA2aA212-
leadA2ECGA2ifA2myA2heartA2rateA2isA2withinA2normalA2limits?"A2TheA2nurseA2respondsA2byA2
explainingA2thatA2whichA2heartA2conditionsA2mayA2beA2identifiedA2byA2theA212-leadA2ECG?
SelectA2allA2thatA2apply.
Cardiotoxicity
CardiacA2murmur
IrregularA2rhythm
MyocardialA2infarction
HeartA2valveA2deformationA2-A2Ans--Cardiotoxicity
TheA212-leadA2ECGA2mayA2showA2changesA2indicativeA2ofA2drugA2toxicity.

IrregularA2rhythm
ObtainingA212-
leadA2ECGA2viewsA2ofA2theA2heartA2isA2helpfulA2inA2theA2assessmentA2ofA2dysrhythmias,A2
orA2irregularA2heartA2rhythms.

MyocardialA2infarction
TheA212-
leadA2ECGA2mayA2showA2changesA2suggestingA2damageA2toA2theA2heartA2includingA2isch
emiaA2andA2myocardialA2infarction.

QuestionA23A2ofA24
WhichA2ECGA2componentA2wouldA2theA2nurseA2measureA2toA2identifyA2theA2totalA2timeA2n
eededA2forA2ventricularA2depolarizationA2andA2repolarizationA2ofA2aA2patient'sA2heart?
A
B
C
DA2-A2Ans--D
TheA2QTA2intervalA2isA2theA2timeA2itA2takesA2forA2ventricularA2depolarizationA2andA2thenA2r
epolarization.A2ItA2isA2calculatedA2byA2measuringA2theA2distanceA2betweenA2theA2QRSA2co
mplexA2andA2theA2TA2wave.

QuestionA24A2ofA24