Ucla Ekg Exam Questions And Answers 2025

UCLA EKG EXAM LATEST
ANSWER ALL QUESTIONS IN THIS SECTION



QUESTION 1



Junctional rhythm - ANSWERS-rhythm: regular

rate: 40-60

P wave: abnormal, ( inverted before or after, or hidden with QRS)

site of pacemaker: AV node

PR interval: <0.12 when present

QRS: normal ( 0.04- 0.12)

QT interval: normal ( 0.36- 0.46)

conduction: 1:1 with abnormal P



QUESTION 2



Causes of junctional rhythm - ANSWERS-digitalis toxicity

acute MI




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, UCLA EKG EXAM LATEST

QUESTION 3



TX of junctional rhythm - ANSWERS-usually none



Symptomatic:

atropine



junctional rhythm rate

junctional accelerated rhythm rate

junctional tachycardia - ANSWERS-junctional rhythm: 40-60

junctional accelerated: 60-100

junctional tachycardia: >100



QUESTION 4



NSR with 1 PJC premature junctional ( rhythm, rate, P wave, site of pacemaker,
QRS, ST segment, QT interval) - ANSWERS-rhythm: regular except for PJC

rate: varies with underlying rhythm

P wave: occur early, not present, or occurs after QRS complex

site of pacemaker: ectopic junctional foci

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, UCLA EKG EXAM LATEST
PR interval: varies or absent for PJC

QRS: usually normal

QT interval: normal

conduction: a premature beat, occurs early than expected



QUESTION 5



Causes of PJC - ANSWERS-Digitalis toxicity

acute MI



QUESTION 6



TX of PJC - ANSWERS-continue to observe



QUESTION 7



NSR with PVC - ANSWERS-rhythm: irregular due to premature beat

rate: less atrial rate than ventricular rate

P wave: usually lost within the wide QRS complex

site of pacemaker: besides normal baseline rhythm, ventricular focus originates
suddenly from ectopic focus in the ventricles

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