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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
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
, 2
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
