Antiarrhythmic Quiz: Can You Steady the Rhythm?

1. Which class of antiarrhythmic drugs blocks sodium channels and slows conduction velocity?

Class I

Class II

Class III

Class IV

2. Beta-blockers are classified as which antiarrhythmic class?

Class I

Class II

Class III

Class IV

3. Amiodarone has properties of all four antiarrhythmic classes. Which effect is its primary mechanism?

Potassium channel blockade

Calcium channel blockade

Sodium channel blockade

Beta-adrenergic blockade

4. Which drug prolongs the QT interval by blocking potassium channels?

Metoprolol

Sotalol

Verapamil

Procainamide

5. Verapamil and diltiazem work by blocking which ion channel?

Sodium channels

Potassium channels

Calcium channels

Chloride channels

6. Which antiarrhythmic is preferred for acute conversion of atrial fibrillation in hemodynamically unstable patients?

Amiodarone

Flecainide

Sotalol

Dofetilide

7. Quinidine and procainamide are Class IA antiarrhythmics. What effect distinguishes them from Class IB agents?

They shorten action potential duration

They lengthen action potential duration

They block calcium channels

They enhance AV nodal conduction

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9. Adenosine terminates supraventricular tachycardia by blocking conduction through which node?

Sinoatrial node

Atrioventricular node

Bundle of His

Purkinje fibers

10. Which electrolyte abnormality increases the risk of torsades de pointes in patients taking Class III antiarrhythmics?

Hyperkalemia

Hypokalemia

Hypercalcemia

Hypermagnesemia

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12. True or False: Digoxin is a potent Class I antiarrhythmic drug used as first-line therapy for atrial fibrillation.

True

False

13. Which antiarrhythmic drug is contraindicated in patients with acute myocardial infarction due to increased mortality?

Amiodarone

Flecainide

Metoprolol

Verapamil

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15. True or False: Magnesium supplementation is an effective antiarrhythmic therapy for preventing torsades de pointes.

True

False

Antiarrhythmic Quiz: Can You Steady the Rhythm?

1. Which class of antiarrhythmic drugs blocks sodium channels and slows conduction velocity?

2.

What first name or nickname would you like us to use?

2. Beta-blockers are classified as which antiarrhythmic class?

3. Amiodarone has properties of all four antiarrhythmic classes. Which effect is its primary mechanism?

4. Which drug prolongs the QT interval by blocking potassium channels?

5. Verapamil and diltiazem work by blocking which ion channel?

6. Which antiarrhythmic is preferred for acute conversion of atrial fibrillation in hemodynamically unstable patients?

7. Quinidine and procainamide are Class IA antiarrhythmics. What effect distinguishes them from Class IB agents?

8. A major concern with Class IC antiarrhythmics like flecainide is the risk of____.

9. Adenosine terminates supraventricular tachycardia by blocking conduction through which node?

10. Which electrolyte abnormality increases the risk of torsades de pointes in patients taking Class III antiarrhythmics?

11. Amiodarone commonly causes pulmonary and thyroid toxicity due to its high____ content.

12. True or False: Digoxin is a potent Class I antiarrhythmic drug used as first-line therapy for atrial fibrillation.

13. Which antiarrhythmic drug is contraindicated in patients with acute myocardial infarction due to increased mortality?

14. Dronedarone is a noniodinated analog of amiodarone used to maintain sinus rhythm in atrial____.

15. True or False: Magnesium supplementation is an effective antiarrhythmic therapy for preventing torsades de pointes.