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4 Antiarrhythmic Medications Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Antiarrhythmic Medications, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Drugs in the same Vaughan Williams class necessarily have identical effects.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which main action defines Class I antiarrhythmic drugs?

  1. A

    Block beta-adrenergic effects

  2. B

    Block fast sodium channels

  3. C

    Prolong repolarization mainly through potassium-channel effects

  4. D

    Block L-type calcium channels in the AV node

03
Fill in the blank
1 point

Class IV antiarrhythmic drugs block in the .

04
Written response
1 point

What arrhythmia can some QT-prolonging antiarrhythmic agents cause?

05
Choose one
1 point

A patient is prescribed a Class II antiarrhythmic. Which expected effect and safety concern best fit this drug class?

  1. A

    They primarily prolong repolarization; monitor for kidney stones.

  2. B

    They block L-type calcium channels; monitor for pulmonary toxicity.

  3. C

    They slow heart rate and AV-node conduction; monitor for bradycardia and hypotension.

  4. D

    They block fast sodium channels; monitor for gingival overgrowth.

06
Choose all
1 point

Select all the Class III antiarrhythmic drugs listed in the material.

  1. A

    Amiodarone

  2. B

    Diltiazem

  3. C

    Dofetilide

  4. D

    Sotalol

  5. E

    Procainamide

07
Fill in the blank
1 point

In atrial fibrillation, and are distinct treatment strategies.

08
True or false
1 point

True or false: Adenosine and digoxin are included in the four Vaughan Williams classes described in the material.

  1. A

    True

  2. B

    False

09
Written response
1 point

Name the Class IA antiarrhythmic drug listed in the material.

10
Choose one
1 point

A hemodynamically stable patient has atrial fibrillation with ventricular pre-excitation. Which option is appropriate under clinician-directed emergency care?

  1. A

    Intravenous diltiazem to slow AV-node conduction

  2. B

    Intravenous procainamide or ibutilide, or electrical cardioversion

  3. C

    Digoxin to slow the ventricular response

  4. D

    Intravenous adenosine

11
Choose all
1 point

A patient with chronic kidney disease and low potassium is starting dofetilide. Select all appropriate safety measures.

  1. A

    Select the dose using kidney function.

  2. B

    Correct the low potassium level before treatment.

  3. C

    Monitor the ECG and QT interval.

  4. D

    Monitor electrolytes and kidney function.

  5. E

    Initiate treatment in monitored care.

  6. F

    Use the usual dose regardless of kidney function.

  7. G

    Check an ECG only if symptoms develop.

12
Open ended
1 point

A patient with atrial fibrillation, a prior myocardial infarction, and significant left-ventricular scar is being considered for rhythm maintenance with flecainide. Explain why this choice is generally inappropriate in this setting.

13
Choose one
1 point

A patient with tachycardia develops hypotension and acute confusion attributable to the rhythm. Which management principle should take priority?

  1. A

    Wait until the exact rhythm mechanism is confirmed before acting.

  2. B

    Give an oral maintenance antiarrhythmic.

  3. C

    Arrange prompt electrical cardioversion when indicated by the rhythm and follow emergency protocols.

  4. D

    Use adenosine for every tachycardia, including irregular wide-complex rhythms.

14
Written response
1 point

What is the main action of Vaughan Williams Class I antiarrhythmic drugs?

15
True or false
1 point

True or false: Adenosine and digoxin have antiarrhythmic effects, but neither is included in the four Vaughan Williams classes.

  1. A

    True

  2. B

    False

16
Written response
1 point

What is the medical term for an antiarrhythmic drug provoking a new arrhythmia or worsening an existing one?

17
Choose one
1 point

A patient taking metoprolol for an arrhythmia is being monitored. Which effects are most relevant to its antiarrhythmic action?

  1. A

    Increased AV-node conduction; monitor for hypertension and tachycardia.

  2. B

    Slower heart rate and AV-node conduction; monitor for bradycardia and hypotension.

  3. C

    Prolonged repolarization; monitor only for kidney stones.

  4. D

    Blocked L-type calcium channels in the ventricles; monitor for pulmonary toxicity.

18
Choose one
1 point

Which combination of adverse effects is especially important to discuss and monitor during long-term amiodarone therapy?

  1. A

    Pulmonary, thyroid, and hepatic toxicity.

  2. B

    Severe hypoglycemia, hearing loss, and kidney stones.

  3. C

    Gingival overgrowth, tendon rupture, and severe hypoglycemia.

  4. D

    Hepatic toxicity only; pulmonary and thyroid effects are not concerns.

19
Choose one
1 point

A patient with atrial fibrillation has a prior myocardial infarction and significant left-ventricular scar. Which drug is generally inappropriate for maintaining sinus rhythm because of proarrhythmic risk in this setting?

  1. A

    Metoprolol, because Class II drugs are generally avoided after myocardial infarction.

  2. B

    Diltiazem, because Class IV drugs cause ventricular scar.

  3. C

    Flecainide, because Class IC drugs are generally avoided in this setting.

  4. D

    Lidocaine, because all Class I drugs have the same risk in structural heart disease.

20
Choose one
1 point

A patient with chronic kidney disease and low serum potassium is starting dofetilide. Which safety approach is most appropriate?

  1. A

    Use the usual dose and obtain an ECG only if symptoms develop.

  2. B

    Select the dose using kidney function, correct the low potassium, and monitor QT and kidney function.

  3. C

    Increase the dose because kidney disease reduces drug exposure.

  4. D

    Add another QT-prolonging drug to offset the low potassium.