30 Minutes Of Sudden-onset in Medicine / Internal Medicine — 45yo Man | Cardiology | SMLE Q#12368
SMLE Question #12368
Medicine / Internal Medicine
Cardiology
Objective: OBJ-163
Last updated: February 2026
A 45-year-old man presents with 30 minutes of sudden-onset palpitations and mild shortness of breath at rest. ECG shows a narrow-complex regular tachycardia consistent with supraventricular tachycardia (SVT) with HR 190/min. He becomes increasingly drowsy and less responsive; repeat vitals show BP 80/45 mmHg with weak peripheral pulses and delayed capillary refill. Which of the following is the most appropriate immediate action?
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