Sudden-onset Palpitations in Medicine / Internal Medicine — 36yo Man | Cardiology | SMLE Q#1091
SMLE Question #1091
Medicine / Internal Medicine
Cardiology
Last updated: February 2026
A 36-year-old man presents with sudden-onset palpitations for 6 hours. He is alert and speaking in full sentences. He denies chest pain, syncope, or dyspnea. Cardiovascular and respiratory examinations are unremarkable, with no carotid bruits. A 12-lead ECG shows a regular narrow-complex tachycardia at 120–130/min with no clearly visible P waves. He remains hemodynamically stable. What is the most appropriate next step in management?
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