UAB Telemetry Basic Dysrhythmia Exam | 100% Correct Answers with rationales| Latest 2024/2025 Version
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UAB Telemetry
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UAB Telemetry
UAB Telemetry Basic Dysrhythmia Exam | 100%
Correct Answers with rationales| Latest 2024/2025
Version
1. Which of the following is a characteristic of sinus bradycardia?
A) Heart rate > 100 bpm
B) Heart rate < 60 bpm
C) P waves are absent
D) QRS complex is greater than 0.12 seconds
...
UAB Telemetry Basic
Dysrhythmia Exam | 100%
Correct Answers with
rationales| Latest
2024/2025 Version
,1|Page
UAB Telemetry Basic Dysrhythmia Exam | 100%
Correct Answers with rationales| Latest 2024/2025
Version
1. Which of the following is a characteristic of sinus bradycardia?
A) Heart rate > 100 bpm
B) Heart rate < 60 bpm
C) P waves are absent
D) QRS complex is greater than 0.12 seconds
Answer: B) Heart rate < 60 bpm
Rationale:
Sinus bradycardia is defined by a heart rate of less than 60 beats per minute (bpm) but with
normal sinus rhythm, meaning the P waves are present and normal, and the QRS complex is
within the normal range. A heart rate above 100 bpm would indicate tachycardia, not
bradycardia.
2. Which rhythm is characterized by an irregularly irregular rhythm and no
identifiable P waves?
A) Atrial fibrillation
B) Sinus tachycardia
C) Atrial flutter
D) Ventricular fibrillation
Answer: A) Atrial fibrillation
Rationale:
Atrial fibrillation is a type of arrhythmia in which the atria fibrillate, leading to an irregularly
irregular rhythm and the absence of distinct P waves. In contrast, atrial flutter has a regular
rhythm with a "sawtooth" pattern of P waves.
3. What is the primary treatment for ventricular fibrillation (VFib)?
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A) Defibrillation
B) Atropine
C) Beta-blockers
D) Synchronized cardioversion
Answer: A) Defibrillation
Rationale:
Ventricular fibrillation is a life-threatening arrhythmia that requires immediate defibrillation to
restore a normal rhythm. Other treatments such as atropine or beta-blockers are used for other
types of arrhythmias, but defibrillation is the first-line treatment for VFib.
4. Which of the following rhythms is associated with a "sawtooth" pattern of P
waves?
A) Atrial fibrillation
B) Atrial flutter
C) Sinus tachycardia
D) Junctional rhythm
Answer: B) Atrial flutter
Rationale:
Atrial flutter is characterized by a rapid, regular atrial rate that results in a "sawtooth" pattern of
P waves. This rhythm is caused by a reentrant circuit in the atrium. In atrial fibrillation, the P
waves are absent and there is an irregular rhythm.
5. In which condition would you expect to see a "wide complex" QRS complex (>
0.12 sec)?
A) Sinus tachycardia
B) Ventricular tachycardia
C) Normal sinus rhythm
D) Atrial fibrillation
Answer: B) Ventricular tachycardia
Rationale:
A wide QRS complex (greater than 0.12 seconds) is characteristic of ventricular arrhythmias like
ventricular tachycardia (VT). VT originates from the ventricles and has a wide and abnormal
QRS complex. A normal QRS complex is narrow (less than 0.12 sec), as seen in sinus
tachycardia, normal sinus rhythm, and atrial fibrillation.
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6. What is the most common cause of a second-degree heart block, Type 1
(Wenckebach)?
A) Coronary artery disease
B) Hyperkalemia
C) Myocardial infarction
D) Increased vagal tone
Answer: D) Increased vagal tone
Rationale:
Second-degree heart block, Type 1 (Wenckebach), is commonly associated with increased vagal
tone, which leads to a progressive delay in the AV node until one beat is dropped (a missed QRS
complex). It can also occur in conditions such as myocardial infarction, but vagal tone is often
the most common underlying cause.
7. A patient presents with a rhythm that has no P waves, a rate of 150 bpm, and a
QRS complex duration of 0.12 seconds. What is the most likely diagnosis?
A) Sinus tachycardia
B) Supraventricular tachycardia (SVT)
C) Ventricular tachycardia (VT)
D) Atrial fibrillation
Answer: C) Ventricular tachycardia (VT)
Rationale:
Ventricular tachycardia (VT) typically has a rate of 150-250 bpm, a wide QRS complex (greater
than 0.12 sec), and no P waves. Supraventricular tachycardia (SVT) usually has a narrow QRS
complex and would have identifiable P waves (though sometimes they may be hidden). Atrial
fibrillation would be irregularly irregular with no identifiable P waves but would not have a
regular rate of 150 bpm.
8. Which of the following is a common feature of third-degree heart block
(complete heart block)?
A) No relationship between the P waves and the QRS complexes
B) P waves that are regular and visible
C) Narrow QRS complexes
D) The atria and ventricles beat in unison
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