Which of the following drugs is the primary agent for paroxysmal supraventricular tachycardia (PSVT)?
1. Flecainide (Tambocor)
2. Adenosine (Adenocard)
3. Lidocaine (Xylocaine)
4. Procainamide (Pronestyl)
Correct Answer: 2
Rationale: Adenosine is the drug of choice for PSVT. Procainamide may be used for supraventricular dysrhythmias, but is not the primary drug for PSVT. Lidocaine and flecainide are indicated for ventricular dysrhythmias.
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