ELIAS ADVANCED DYSRHYTHMIA
EXAM PREP QUESTIONS AND
ANSWERS
1. A patient exhibits a sudden drop in QRS complexes without any prior lengthening of the PR
interval. Which block is most likely present?
A. First-degree AV block
B. Second-degree AV block, Mobitz Type II
C. Second-degree AV block, Mobitz Type I
D. Third-degree AV block
Answer: B
Conceptual Explanation: Mobitz Type II is characterized by intermittent dropped QRS
complexes with a constant PR interval in the conducted beats, usually occurring at the
bundle of His or bundle branches.
2. What is the first-line pharmacological treatment for a patient in Torsades de Pointes who is
hemodynamically stable?
A. Magnesium Sulfate 1-2g IV
,B. Amiodarone 300mg IV
C. Lidocaine 100mg IV
D. Epinephrine 1mg IV
Answer: A
Conceptual Explanation: Magnesium sulfate is the drug of choice for treating and
preventing recurrences of Torsades de Pointes, regardless of the serum magnesium level.
3. In a Junctional Escape Rhythm, where does the electrical impulse originate?
A. SA Node
B. Purkinje Fibers
C. AV Node or Bundle of His
D. Left Atrium
Answer: C
Conceptual Explanation: Junctional rhythms originate near the AV junction, typically in
the AV node or the Bundle of His, when the SA node fails to fire.
4. Which ECG feature is a hallmark of Wolff-Parkinson-White (WPW) syndrome?
A. U waves
B. Peaked T waves
C. Delta waves
, D. Osborn waves
Answer: C
Conceptual Explanation: The delta wave is a slurred upstroke of the QRS complex caused
by pre-excitation of the ventricles via an accessory pathway.
5. What is the standard adult dose for the first administration of Adenosine in stable
Supraventricular Tachycardia (SVT)?
A. 3 mg
B. 20 mg
C. 12 mg
D. 6 mg
Answer: D
Conceptual Explanation: ACLS guidelines recommend an initial dose of 6 mg rapid IV
push followed by a saline flush for stable SVT.
6. Which of the following describes the PR interval in First-degree AV block?
A. Progressively lengthening
B. Consistently greater than 0.20 seconds
C. Less than 0.12 seconds
D. Highly variable with no P-QRS relationship
EXAM PREP QUESTIONS AND
ANSWERS
1. A patient exhibits a sudden drop in QRS complexes without any prior lengthening of the PR
interval. Which block is most likely present?
A. First-degree AV block
B. Second-degree AV block, Mobitz Type II
C. Second-degree AV block, Mobitz Type I
D. Third-degree AV block
Answer: B
Conceptual Explanation: Mobitz Type II is characterized by intermittent dropped QRS
complexes with a constant PR interval in the conducted beats, usually occurring at the
bundle of His or bundle branches.
2. What is the first-line pharmacological treatment for a patient in Torsades de Pointes who is
hemodynamically stable?
A. Magnesium Sulfate 1-2g IV
,B. Amiodarone 300mg IV
C. Lidocaine 100mg IV
D. Epinephrine 1mg IV
Answer: A
Conceptual Explanation: Magnesium sulfate is the drug of choice for treating and
preventing recurrences of Torsades de Pointes, regardless of the serum magnesium level.
3. In a Junctional Escape Rhythm, where does the electrical impulse originate?
A. SA Node
B. Purkinje Fibers
C. AV Node or Bundle of His
D. Left Atrium
Answer: C
Conceptual Explanation: Junctional rhythms originate near the AV junction, typically in
the AV node or the Bundle of His, when the SA node fails to fire.
4. Which ECG feature is a hallmark of Wolff-Parkinson-White (WPW) syndrome?
A. U waves
B. Peaked T waves
C. Delta waves
, D. Osborn waves
Answer: C
Conceptual Explanation: The delta wave is a slurred upstroke of the QRS complex caused
by pre-excitation of the ventricles via an accessory pathway.
5. What is the standard adult dose for the first administration of Adenosine in stable
Supraventricular Tachycardia (SVT)?
A. 3 mg
B. 20 mg
C. 12 mg
D. 6 mg
Answer: D
Conceptual Explanation: ACLS guidelines recommend an initial dose of 6 mg rapid IV
push followed by a saline flush for stable SVT.
6. Which of the following describes the PR interval in First-degree AV block?
A. Progressively lengthening
B. Consistently greater than 0.20 seconds
C. Less than 0.12 seconds
D. Highly variable with no P-QRS relationship
