SHARP ECG TEST: QUESTIONS WITH
CORRECT ANSWERS
Tachycardia and bradycardia - CORRECT ANSWER ->100 bpm
<60 bpm
Bigeminy - CORRECT ANSWER -every other complex is a PVC
Trigeminy - CORRECT ANSWER -pattern in which every third complex is a premature beat
Premature Junctional Contraction (PJC) - CORRECT ANSWER -Rate: Normal or accelerated
P wave: inverted or absent
QRS: normal
Conduction: normal
rhythm: irregular: PICs occur early in cycle of baseline rhythm
-an ectopic pacemaker in the AV Junction produces PJC's
-may occur in heatlhy or diseased hearts
-if occasional, insignificant
Premature Atrial Contraction (PAC) - CORRECT ANSWER -Heart Rate: Depends on underlying
rhythm
Regularity: Interrupts the regularity of underlying rhythm
P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave
PRI: measures between .12-.20 seconds and can be prolonged; can be different from other
complexes
, QRS: <.12 seconds
CharacteristicsWofWVentricularWTachycardiaW-WCORRECTWANSWERW-
WideWanWbizarreWQRSWcomplex,WgreaterWthanW100WbeatsWperWminute,WabsentWPWwaves,WnoWPRI,W
canWbeWmonomorphicWorWpolymorphic
SAWnodeWrateW-WCORRECTWANSWERW-60-100Wbpm
AVWnodeWrateW-WCORRECTWANSWERW-40-60Wbpm
PrukinjeWfiberWrateW-WCORRECTWANSWERW-15-40bpm
AcceleratedWJunctionalWRhythmW-WCORRECTWANSWERW-regularWrhythm,WrateW60-
100,WpWwavesWinvertedWorWoccurWbeforeWduringWorWafterWQRS,WPRIWmeasuredWifWpWbeforeWQRSW<
0.12
AVWBlocksW-WCORRECTWANSWERW-
AVWblocksWareWidentifiedWasWaWdelayWorWinterruptionWofWtheWelectricalWimpulseWconductionWbeyo
ndWtheWAVWnode.WItWisWevaluatedWbyWmeasuringWtheWPRWintervalWinWECGWtraces.WTHEWPRWINTERV
ALWISWTHEWKEYWOFWDIFFERENTIATIONWANDWCLASSIFICATIONWOFWTHEWAVWBLOCKS!
FirstWdegreeWAVWblockW-WCORRECTWANSWERW-prolongedWPRWinterval
SecondWDegreeWAVWblockWtypeW1W-WCORRECTWANSWERW-AKAWWenckebach
ResultsWfromWaWcyclicalWandWprogressiveWconductionWdelayWthroughWtheWAVWjunction.
CharacteristicWcyclicalWlengtheningWofWtheWPRWintervalWfollowedWbyWaWdroppedWQRSW(orWaWPWwav
eWwithWnoWQRS).
IrregularWRhythm
CORRECT ANSWERS
Tachycardia and bradycardia - CORRECT ANSWER ->100 bpm
<60 bpm
Bigeminy - CORRECT ANSWER -every other complex is a PVC
Trigeminy - CORRECT ANSWER -pattern in which every third complex is a premature beat
Premature Junctional Contraction (PJC) - CORRECT ANSWER -Rate: Normal or accelerated
P wave: inverted or absent
QRS: normal
Conduction: normal
rhythm: irregular: PICs occur early in cycle of baseline rhythm
-an ectopic pacemaker in the AV Junction produces PJC's
-may occur in heatlhy or diseased hearts
-if occasional, insignificant
Premature Atrial Contraction (PAC) - CORRECT ANSWER -Heart Rate: Depends on underlying
rhythm
Regularity: Interrupts the regularity of underlying rhythm
P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave
PRI: measures between .12-.20 seconds and can be prolonged; can be different from other
complexes
, QRS: <.12 seconds
CharacteristicsWofWVentricularWTachycardiaW-WCORRECTWANSWERW-
WideWanWbizarreWQRSWcomplex,WgreaterWthanW100WbeatsWperWminute,WabsentWPWwaves,WnoWPRI,W
canWbeWmonomorphicWorWpolymorphic
SAWnodeWrateW-WCORRECTWANSWERW-60-100Wbpm
AVWnodeWrateW-WCORRECTWANSWERW-40-60Wbpm
PrukinjeWfiberWrateW-WCORRECTWANSWERW-15-40bpm
AcceleratedWJunctionalWRhythmW-WCORRECTWANSWERW-regularWrhythm,WrateW60-
100,WpWwavesWinvertedWorWoccurWbeforeWduringWorWafterWQRS,WPRIWmeasuredWifWpWbeforeWQRSW<
0.12
AVWBlocksW-WCORRECTWANSWERW-
AVWblocksWareWidentifiedWasWaWdelayWorWinterruptionWofWtheWelectricalWimpulseWconductionWbeyo
ndWtheWAVWnode.WItWisWevaluatedWbyWmeasuringWtheWPRWintervalWinWECGWtraces.WTHEWPRWINTERV
ALWISWTHEWKEYWOFWDIFFERENTIATIONWANDWCLASSIFICATIONWOFWTHEWAVWBLOCKS!
FirstWdegreeWAVWblockW-WCORRECTWANSWERW-prolongedWPRWinterval
SecondWDegreeWAVWblockWtypeW1W-WCORRECTWANSWERW-AKAWWenckebach
ResultsWfromWaWcyclicalWandWprogressiveWconductionWdelayWthroughWtheWAVWjunction.
CharacteristicWcyclicalWlengtheningWofWtheWPRWintervalWfollowedWbyWaWdroppedWQRSW(orWaWPWwav
eWwithWnoWQRS).
IrregularWRhythm
