ECGs: Normal Sinus Rhythm, Sinus
Tachycardia, Sinus Bradycardia -
Practice Questions And Answers
A knurse kobserves kan kECG kwith kthe kfollowing kcharacteristics:
k• kHeart krate: k85 kbpm
k• kP kwaves kpresent kand kuniform
k• kPR kinterval: k0.14 kseconds
k• kQRS kduration: k0.08 kseconds
k• kRegular krhythm
How kshould kthe knurse kinterpret kthis krhythm?
A) kAtrial kfibrillation
B) kNormal ksinus krhythm
C) kSinus ktachycardia
D) kSinus kbradycardia k- kAnswer k- kB) kNormal ksinus krhythm
✔ kNSR kcharacteristics: kHR k60-100 kbpm, kregular krhythm, knormal kP kwaves, kPR kinterval k0.12-0.20
ksec, kand kQRS k0.06-0.10 ksec.
✖ kA kis kincorrect k→ kAtrial kfibrillation khas kan kirregular krhythm kand kno kdistinct kP kwaves.
✖ kC kis kincorrect k→ kSinus ktachycardia kis kHR k>100 kbpm.
✖ kD kis kincorrect k→ kSinus kbradycardia kis kHR k<60 kbpm.
Which kfactors kcan kcause ksinus ktachycardia? k(Select kAll kThat kApply.)
A) kFever
B) kBeta kblocker kuse
C) kAnemia
,D) kDehydration
E) kHyperthyroidism k- kAnswer k- kA, kC, kD, kE
✔ kFever k(A) k→ kIncreases kmetabolic kdemand, kincreasing kHR.
✔ kAnemia k(C) k→ kLess koxygen-carrying kcapacity, kincreasing kHR kto kcompensate.
✔ kDehydration k(D) k→ kReduced kblood kvolume, kleading kto kcompensatory ktachycardia.
✔ kHyperthyroidism k(E) k→ kIncreases kmetabolism kand kHR.
✖ kB kis kincorrect k→ kBeta kblockers kdecrease kHR kand kare kused kto ktreat ktachycardia.
A knurse knotes kHR k120 kbpm, knormal kP kwaves, kPR kinterval k0.16 ksec, kand kQRS kduration k0.08 ksec.
kWhat kis kthe kmost klikely krhythm?
A) kSinus ktachycardia
B) kAtrial kfibrillation
C) kVentricular ktachycardia
D) kFirst-degree kAV kblock k- kAnswer k- kA) kSinus ktachycardia
✔ kHR k>100 kbpm, knormal kP kwaves, kand ka kregular krhythm kindicate ksinus ktachycardia.
Which ksymptom kis kmost kconcerning kin ka kpatient kwith ksinus kbradycardia k(HR k45 kbpm)?
A) kFatigue
B) kBlood kpressure k110/70 kmmHg
C) kSyncope
D) kMild kdizziness k- kAnswer k- kC) kSyncope
✔ kSyncope k(fainting) ksuggests kdecreased kcardiac koutput kand krequires kimmediate kintervention.
✖ kA, kB, kand kD kare kcommon kbut knot kas kimmediately kconcerning.
A kpatient kwith ksinus kbradycardia k(HR k38 kbpm) kis kexperiencing khypotension kand kdizziness. kWhich
kintervention kshould kthe knurse kanticipate?
A) kAdminister kIV katropine
, B) kPerform kcarotid kmassage
C) kAdminister kIV kmetoprolol
D) kEncourage ka khigh-fiber kdiet k- kAnswer k- kA) kAdminister kIV katropine
✔ kAtropine kincreases kHR kby kblocking kthe kvagus knerve.
✖ kB kis kincorrect k→ kCarotid kmassage kfurther kslows kHR.
✖ kC kis kincorrect k→ kMetoprolol k(beta kblocker) kwould kworsen kbradycardia.
A kpatient khas ka kPR kinterval kof k0.24 kseconds. kWhat kshould kthe knurse kdocument?
A) kNormal ksinus krhythm
B) kProlonged kPR kinterval
C) kShortened kPR kinterval
D) kWidened kQRS kcomplex k- kAnswer k- kB) kProlonged kPR kinterval
✔ kA knormal kPR kinterval kis k0.12-0.20 ksec. kA kPR k>0.20 ksec ksuggests ka kfirst-degree kAV kblock.
Which kpatient kwith ksinus kbradycardia kis kmost klikely kto kneed ka kpacemaker?
A) kHR k55 kbpm, kno ksymptoms
B) kHR k40 kbpm, kfrequent kdizziness kand ksyncope
C) kHR k50 kbpm, koccasional kfatigue
D) kHR k48 kbpm kafter ktaking ka kbeta kblocker k- kAnswer k- kB) kHR k40 kbpm, kfrequent kdizziness kand
ksyncope
✔ kSymptomatic kbradycardia krequires kpacemaker kconsideration.
Which kstatement kabout ksinus ktachycardia kis kcorrect?
A) kIt kincreases kmyocardial koxygen kdemand.
B) kIt kenhances kcoronary kartery kperfusion.
C) kIt kcauses kheart kfailure kin kall kpatients.
Tachycardia, Sinus Bradycardia -
Practice Questions And Answers
A knurse kobserves kan kECG kwith kthe kfollowing kcharacteristics:
k• kHeart krate: k85 kbpm
k• kP kwaves kpresent kand kuniform
k• kPR kinterval: k0.14 kseconds
k• kQRS kduration: k0.08 kseconds
k• kRegular krhythm
How kshould kthe knurse kinterpret kthis krhythm?
A) kAtrial kfibrillation
B) kNormal ksinus krhythm
C) kSinus ktachycardia
D) kSinus kbradycardia k- kAnswer k- kB) kNormal ksinus krhythm
✔ kNSR kcharacteristics: kHR k60-100 kbpm, kregular krhythm, knormal kP kwaves, kPR kinterval k0.12-0.20
ksec, kand kQRS k0.06-0.10 ksec.
✖ kA kis kincorrect k→ kAtrial kfibrillation khas kan kirregular krhythm kand kno kdistinct kP kwaves.
✖ kC kis kincorrect k→ kSinus ktachycardia kis kHR k>100 kbpm.
✖ kD kis kincorrect k→ kSinus kbradycardia kis kHR k<60 kbpm.
Which kfactors kcan kcause ksinus ktachycardia? k(Select kAll kThat kApply.)
A) kFever
B) kBeta kblocker kuse
C) kAnemia
,D) kDehydration
E) kHyperthyroidism k- kAnswer k- kA, kC, kD, kE
✔ kFever k(A) k→ kIncreases kmetabolic kdemand, kincreasing kHR.
✔ kAnemia k(C) k→ kLess koxygen-carrying kcapacity, kincreasing kHR kto kcompensate.
✔ kDehydration k(D) k→ kReduced kblood kvolume, kleading kto kcompensatory ktachycardia.
✔ kHyperthyroidism k(E) k→ kIncreases kmetabolism kand kHR.
✖ kB kis kincorrect k→ kBeta kblockers kdecrease kHR kand kare kused kto ktreat ktachycardia.
A knurse knotes kHR k120 kbpm, knormal kP kwaves, kPR kinterval k0.16 ksec, kand kQRS kduration k0.08 ksec.
kWhat kis kthe kmost klikely krhythm?
A) kSinus ktachycardia
B) kAtrial kfibrillation
C) kVentricular ktachycardia
D) kFirst-degree kAV kblock k- kAnswer k- kA) kSinus ktachycardia
✔ kHR k>100 kbpm, knormal kP kwaves, kand ka kregular krhythm kindicate ksinus ktachycardia.
Which ksymptom kis kmost kconcerning kin ka kpatient kwith ksinus kbradycardia k(HR k45 kbpm)?
A) kFatigue
B) kBlood kpressure k110/70 kmmHg
C) kSyncope
D) kMild kdizziness k- kAnswer k- kC) kSyncope
✔ kSyncope k(fainting) ksuggests kdecreased kcardiac koutput kand krequires kimmediate kintervention.
✖ kA, kB, kand kD kare kcommon kbut knot kas kimmediately kconcerning.
A kpatient kwith ksinus kbradycardia k(HR k38 kbpm) kis kexperiencing khypotension kand kdizziness. kWhich
kintervention kshould kthe knurse kanticipate?
A) kAdminister kIV katropine
, B) kPerform kcarotid kmassage
C) kAdminister kIV kmetoprolol
D) kEncourage ka khigh-fiber kdiet k- kAnswer k- kA) kAdminister kIV katropine
✔ kAtropine kincreases kHR kby kblocking kthe kvagus knerve.
✖ kB kis kincorrect k→ kCarotid kmassage kfurther kslows kHR.
✖ kC kis kincorrect k→ kMetoprolol k(beta kblocker) kwould kworsen kbradycardia.
A kpatient khas ka kPR kinterval kof k0.24 kseconds. kWhat kshould kthe knurse kdocument?
A) kNormal ksinus krhythm
B) kProlonged kPR kinterval
C) kShortened kPR kinterval
D) kWidened kQRS kcomplex k- kAnswer k- kB) kProlonged kPR kinterval
✔ kA knormal kPR kinterval kis k0.12-0.20 ksec. kA kPR k>0.20 ksec ksuggests ka kfirst-degree kAV kblock.
Which kpatient kwith ksinus kbradycardia kis kmost klikely kto kneed ka kpacemaker?
A) kHR k55 kbpm, kno ksymptoms
B) kHR k40 kbpm, kfrequent kdizziness kand ksyncope
C) kHR k50 kbpm, koccasional kfatigue
D) kHR k48 kbpm kafter ktaking ka kbeta kblocker k- kAnswer k- kB) kHR k40 kbpm, kfrequent kdizziness kand
ksyncope
✔ kSymptomatic kbradycardia krequires kpacemaker kconsideration.
Which kstatement kabout ksinus ktachycardia kis kcorrect?
A) kIt kincreases kmyocardial koxygen kdemand.
B) kIt kenhances kcoronary kartery kperfusion.
C) kIt kcauses kheart kfailure kin kall kpatients.
