EKG TECHNICIAN STUDY GUIDE QUESTIONS AND CORRECT VERIFIED ANSWERS

EKG TECHNICIAN STUDY GUIDE
QUESTIONS AND CORRECT VERIFIED
ANSWERS
EndocardiumA2-A2Ans--
TheA2innermostA2layerA2ofA2theA2heart,A2itA2formsA2theA2liningA2andA2foldsA2backA2ontoA2its
elfA2toA2formA2theA2fourA2valves.A2ItA2isA2inA2thisA2layerA2thatA2theA2conductionA2systemA2isA
2found


MyocardiumA2-A2Ans--MuscularA2layerA2ofA2theA2heart

EpicardiumA2-A2Ans--
TheA2outermostA2layerA2ofA2theA2heart.A2ItA2isA2actuallyA2theA2innerA2layerA2ofA2theA2pericar
dium

RightA2atriumA2-A2Ans--
ReceivesA2deoxygenatedA2bloodA2returningA2toA2theA2heartA2fromA2theA2bodyA2viaA2theA2s
uperiorA2venaA2cavA2whichA2carriesA2bloodA2fromA2theA2upperA2bodyA2andA2theA2inferiorA2v
enaA2cavaA2whichA2carriesA2bloodA2fromA2theA2lowerA2body.

RightA2ventricleA2-A2Ans--
ReceivesA2deoxygenatedA2bloodA2fromA2theA2rightA2atriumA2whichA2pumpsA2toA2theA2lungs
A2forA2oxygenationA2throughA2theA2pulmonaryA2arteryA2(trunk)A2toA2theA2rightA2andA2leftA2p
ulmonaryA2arteries

LeftA2atriumA2-A2Ans--
ReceivesA2oxygenatedA2bloodA2returningA2fromA2theA2lungsA2viaA2theA2rightA2andA2leftA2pul
monaryA2veins.

LeftA2ventricleA2-A2Ans--
ReceivesA2theA2oxygenatedA2bloodA2fromA2theA2leftA2atriumA2andA2pumpsA2itA2toA2theA2bod
yA2throughA2theA2aorta,A2theA2largestA2arteryA2ofA2theA2body.

TheA2twoA2semilunarA2valvesA2-A2Ans--PulmonicA2valvesA2andA2aorticA2valves

HeartA2SoundsA2S1A2-A2Ans--
FirstA2heartA2soundA2isA2dueA2toA2theA2closureA2ofA2theA2mitralA2andA2tricuspidA2valves

HeartA2SoundsA2S2A2-A2Ans--
SecondA2heartA2soudnA2isA2dueA2toA2closureA2ofA2theA2aorticA2andA2pulmonicA2valves

CoronaryA2arteriesA2-A2Ans--TheA2arteriesA2supplyingA2theA2heartA2withA2blood

, SympatheticA2NervousA2SystemA2-A2Ans--
AffectsA2bothA2theA2ventriclesA2andA2atriumA2byA2increasingA2heartA2rate,A2conductionA2an
dA2irritability

ParasympatheticA2NervousA2SystemA2-A2Ans--
AffectsA2theA2atriaA2onlyA2byA2decreasingA2heartA2rate,A2conductionA2andA2irritability

AutomaticityA2-A2Ans--
ThisA2isA2theA2abilityA2ofA2theA2cardiacA2cellsA2toA2stimulateA2theirA2ownA2electricalA2impuls
eA2withoutA2beingA2stimulatedA2fromA2anotherA2source

ExcitabilityA2-A2Ans--
Irritability,A2sharedA2byA2allA2cardiacA2cellsA2andA2itA2theA2abilityA2toA2respondA2toA2external
A2stimulus;A2electrical,A2chemicalA2andA2mechanical


ConductivityA2-A2Ans--
ThisA2isA2theA2abilityA2ofA2allA2cardiacA2celllsA2toA2receiveA2andA2electricalA2stimulusA2adnA2
transmitA2theA2stimulusA2otA2theA2otherA2cardiacA2cells

ContractilityA2-A2Ans--
ThisA2isA2theA2abilityA2ofA2theA2cardiacA2cellsA2toA2shortenA2andA2causeA2cardiacA2muscleA2
contractionA2inA2responseA2toA2anA2electricalA2stimulus

SAA2nodeA2-A2Ans--PrimaryA2pacemakerA2ofA2theA2heart,A2instriniscA2rateA2ofA260A2-
100A2beatsA2perA2minute

AVA2nodeA2-A2Ans--
LocatedA2atA2theA2posteriorA2septalA2wallA2ofA2theA2rightA2atrium,A2justA2aboveA2theA2tricus
pidA2valve.A2ThereA2isA2aA21/10thA2ofA2aA2secondA2delayA2ofA2electricalA2activityA2atA2thisA2l
evelA2toA2allowA2theA2bloodA2toA2flowA2fromA2theA2atriaA2toA2theA2ventricles.A2IntrinsicA2rateA
2ofA240-60A2beatsA2perA2minute


BundleA2ofA2HisA2-A2Ans--
FoundA2atA2theA2superiorA2portionA2ofA2theA2interventricularA2septum,A2itA2isA2theA2pathway
A2thatA2leadsA2toA2theA2SAA2node.A2IntrinsicA2rateA240-60A2beatsA2perA2minute.


BundleA2BranchesA2-A2Ans--
LocatedA2atA2theA2interventricularA2septum.A2TheA2bundleA2ofA2HisA2dividesA2intoA2theA2rig
htA2andA2leftA2bundleA2branches.A2TheA2functionA2isA2toA2conductA2theA2electricalA2impulse
A2toA2theA2purkinjeA2fibers.


PurkinjeA2FibersA2-A2Ans--
FoundA2withinA2theA2ventricularA2endocardium.A2InstrinsicA2rateA2isA220-
40A2beatsA2perA2minute.

UnipolarA2PrecordialA2LeadsA2-A2Ans--V1,V2,V3,V4,V5A2andA2V6