Correct Answers | Latest Update 2026 | Medical Exam
Prep
1. Describe the clinical significance of ST segment elevation in an EKG reading.
ST segment elevation is a sign of bradycardia.
ST segment elevation shows that the heart is functioning normally.
ST segment elevation suggests an ongoing infarct and indicates
acute injury to the heart muscle.
ST segment elevation indicates a normal sinus rhythm.
2. What are the ECG criteria for a bundle branch block?
T waves must be inverted
The R-S transition must occur in lead V3 or V4
There must be an R-R' morphology ("bunny ears)
The QRS width must be > .12 seconds and the rhythm must be
supraventricular.
3. Describe the significance of the 'grouping' pattern observed in Mobitz Type I
AV block.
The 'grouping' pattern signifies a rapid heart rate and increased
cardiac output.
The 'grouping' pattern indicates a progressive delay in conduction
through the AV node, leading to dropped beats.
The 'grouping' pattern is unrelated to the conduction system of the
heart.
, The 'grouping' pattern shows a consistent conduction without any
dropped beats.
4. What is sinus bradycardia?
HR < 60bpm
None of the above
HR > 100bpm
HR of 60-100bpm
5. Describe the significance of a heart rate in the 40's when interpreting an EKG.
A heart rate in the 40's indicates potential conduction issues such as
AV blocks or a ventricular rhythm.
A heart rate in the 40's means the patient is in sinus rhythm.
A heart rate in the 40's is always indicative of myocardial infarction.
A heart rate in the 40's suggests a healthy heart function.
6. If a patient presents with a heart rate in the 40's and exhibits symptoms of
dizziness and fatigue, what should be the immediate clinical consideration?
Monitor for signs of hyperkalemia.
Consider increasing the patient's exercise regimen.
Evaluate for potential AV block or ventricular rhythm.
Administer a beta-blocker to stabilize heart rate.
7. Which heart rate is most closely associated with with supraventricular
tachycardia
100-180
60-100
, 40-60
150-250
8. Which statement about asystole would the nurse identify as accurate?
Asystole is an organized rhythm without a pulse.
Asystole is the absence of electrical activity on the ECG.
Asystole is not reversible.
Asystole has a very good prognosis for recovery.
9. If a patient presents with EKG findings of a shortened QT interval and down-
sloping ST segment depression, what clinical action should be taken
regarding their Digitalis medication?
Evaluate the patient's Digitalis dosage and consider toxicity.
Monitor the patient for signs of myocardial infarction.
Increase the Digitalis dosage to enhance cardiac output.
Discontinue all medications immediately.
10. What is the heart rate threshold that defines idioventricular rhythm?
60-100 bpm
40-60 bpm
Less than 40 bpm
100-120 bpm
11. What is the heart rate characteristic of Sinus Bradycardia?
More than 100 bpm
Less than 60 bpm
, 60-100 bpm
80-120 bpm
12. If a patient presents with a wide QRS complex and 'bunny ears' on their EKG,
what condition might they be experiencing?
Atrial Fibrillation
Myocardial Infarction
Bundle Branch Block
Normal Sinus Rhythm
13. If a patient presents with ST segment elevation on their EKG, what immediate
action should be taken to address the potential cardiac condition?
Initiate treatment for acute myocardial infarction
Monitor the patient without intervention
Schedule a follow-up appointment in a week
Perform a stress test to assess heart function
14. Which of the following EKG changes may indicate myocardial ischemia or
infarction?
T wave inversion.
ST segment elevation.
All of the above.
ST segment depression.
15. Describe the key characteristics of Supraventricular Tachycardia (SVT) as it
relates to its origin and wave patterns.
SVT is caused by a blockage in the ventricles and shows distinct QRS