Question

A 32-year-old male with history of recurrent paroxysmal supraventricular tachycardia is stable in sinus rhythm. What is the best choice for long-term prophylaxis?

• A. IV adenosine
• B. IV esmolol
• C. Oral diltiazem
• D. IV amiodarone

Hint:

PSVT acute termination = adenosine; long-term prophylaxis may use oral diltiazem or beta blockers.

Answer 1

The Correct Option is C

Concept: Paroxysmal supraventricular tachycardia can be prevented by drugs that slow AV nodal conduction. Oral calcium channel blockers such as diltiazem can be used for long-term prophylaxis.

Step 1: Identify condition.
The patient has recurrent: \[ \text{Paroxysmal supraventricular tachycardia} \]

Step 2: Differentiate acute and long-term drugs.
IV adenosine is used for acute termination, not long-term prophylaxis.

Step 3: Choose long-term option.
Oral diltiazem is appropriate for long-term prophylaxis.