An adult patient with symptomatic supraventricular tachycardia has a heart rate of 190 beats per minute with stable blood pressure. Following unsuccessful vagal maneuvers, what is the initial pharmacologic intervention?
Answer and explanation
Correct answer: B. Intravenous adenosine 6 mg rapid push with a 20 mL saline flush
Answer: Intravenous adenosine 6 mg rapid push with a 20 mL saline flush.
Why not the others: Amiodarone is indicated for ventricular arrhythmias or refractory atrial fibrillation; Metoprolol slow titration is second-line if adenosine fails; Digoxin has a slow onset of several hours and is unsuitable for acute chemical cardioversion.
Why not the others: Amiodarone is indicated for ventricular arrhythmias or refractory atrial fibrillation; Metoprolol slow titration is second-line if adenosine fails; Digoxin has a slow onset of several hours and is unsuitable for acute chemical cardioversion.
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