HESI Exit Exam Prep: Cardiac Pharmacology, Antiarrhythmics & Anticoagulants Question Bank

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HESI Exit Exam Prep: Cardiac
Pharmacology, Antiarrhythmics &
Anticoagulants Question Bank




Table of Contents
Subtopic 1: Mechanisms and Classifications of Antiarrhythmic Drugs.............2
Subtopic 2: Anticoagulants – Mechanisms, Indications, and Monitoring........10
Subtopic 3: Nursing Management and Monitoring of Antiarrhythmic &
Anticoagulant Therapy...................................................................................19
Subtopic 4: Drug Interactions and Complications of Cardiac Pharmacology..27
Subtopic 5: Clinical Case Scenarios in Cardiac Drug Decision-Making...........36
Subtopic 6: Adverse Effects and Nursing Implications of Antiarrhythmics &
Anticoagulants...............................................................................................45
Subtopic 7: Contraindications, Precautions, and Drug-Drug Interactions in
Cardiac Pharmacology...................................................................................54
Subtopic 8: Patient Education and Medication Compliance in Cardiac
Pharmacology................................................................................................62
Subtopic 9: Cardiac Medication Emergencies and Reversal Protocols...........71
Subtopic 10: Advanced Clinical Judgment in Cardiac Pharmacology.............79

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Subtopic 1: Mechanisms and Classifications of
Antiarrhythmic Drugs
Question 1

A patient is prescribed amiodarone for atrial fibrillation. What is the primary
mechanism of action of amiodarone?

A. Beta-adrenergic receptor blockade

B. Prolongation of the action potential and refractory period

C. Calcium channel blockade

D. Sodium channel activation



Correct Answer: B. Prolongation of the action potential and refractory period

Rationale: Amiodarone primarily works by blocking potassium channels,
thereby prolonging the repolarization phase, action potential duration, and
refractory period, classifying it as a Class III antiarrhythmic.



Question 2

Which antiarrhythmic class is most associated with a risk for torsades de
pointes due to QT prolongation?

A. Class I

B. Class III

C. Class II

D. Class IV



Correct Answer: B. Class III

Rationale: Class III antiarrhythmics, such as sotalol and amiodarone, prolong
repolarization and QT interval, increasing the risk for torsades de pointes.

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Question 3

Lidocaine is effective in treating which type of arrhythmia?

A. Atrial fibrillation

B. Ventricular tachycardia

C. Atrial flutter

D. Sinus bradycardia



Correct Answer: B. Ventricular tachycardia

Rationale: Lidocaine, a Class IB antiarrhythmic, is most effective for
ventricular arrhythmias, particularly those associated with acute myocardial
infarction.



Question 4

Which of the following antiarrhythmic classes works by blocking beta-
adrenergic receptors?

A. Class I

B. Class II

C. Class III

D. Class IV



Correct Answer: B. Class II

Rationale: Class II antiarrhythmics are beta-blockers that slow conduction
through the AV node by blocking beta-adrenergic receptors.



Question 5

Which drug is classified as a Class IC antiarrhythmic?

A. Amiodarone

B. Flecainide

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C. Metoprolol

D. Verapamil



Correct Answer: B. Flecainide

Rationale: Flecainide is a potent Class IC antiarrhythmic that works by
strongly blocking sodium channels, significantly slowing conduction.



Question 6

What is the effect of Class IV antiarrhythmics on the heart?

A. Block potassium channels

B. Block L-type calcium channels

C. Increase sympathetic tone

D. Decrease myocardial oxygen demand



Correct Answer: B. Block L-type calcium channels

Rationale: Class IV drugs like verapamil and diltiazem inhibit calcium influx,
particularly affecting the SA and AV nodes, which depend on calcium for
conduction.



Question 7

Which antiarrhythmic agent can cause pulmonary fibrosis as a serious
adverse effect?

A. Lidocaine

B. Metoprolol

C. Amiodarone

D. Sotalol



Correct Answer: C. Amiodarone