IBHRE Pharmacology and Drug Therapy

Question 1

Which class of antiarrhythmic drug works by blocking fast sodium channels?

Accepted Answer

Class I

Answer

Class II

Answer

Class III

Answer

Class IV

Question 2

Amiodarone is primarily classified under which Vaughan Williams class?

Accepted Answer

Class III

Answer

Class I

Answer

Class II

Answer

Class IV

Question 3

Which antiarrhythmic drug is contraindicated in structural heart disease due to increased mortality demonstrated in the CAST trial?

Accepted Answer

Flecainide

Answer

Metoprolol

Answer

Amiodarone

Answer

Sotalol

Question 4

What is the primary mechanism by which adenosine terminates paroxysmal SVT?

Accepted Answer

Activates A1 receptors causing transient AV block

Answer

Blocks L-type calcium channels

Answer

Blocks IKr potassium channels

Answer

Activates beta-adrenergic receptors

Question 5

Ibutilide is primarily indicated for acute pharmacological conversion of which arrhythmia?

Accepted Answer

Atrial flutter and atrial fibrillation

Answer

Ventricular tachycardia

Answer

AVNRT

Answer

Sinus tachycardia

Question 6

Which beta-blocker has an ultra-short half-life of approximately 9 minutes, making it ideal for acute rate control?

Accepted Answer

Esmolol

Answer

Metoprolol

Answer

Atenolol

Answer

Carvedilol