skip to main content

Paroxysmal supraventricular tachycardia — MCCQE Part 1 MCQ

Instant feedback + full explanation. One question, done properly.

ModeratePalpitationsParoxysmal supraventricular tachycardiaMCCQE Part 1

A 29-year-old woman presents with abrupt-onset palpitations and light-headedness. ECG shows a regular narrow-complex tachycardia at 180/min, blood pressure is 118/70 mmHg, and she is alert with no chest pain. Vagal manoeuvres do not terminate the rhythm. What is the most appropriate next step in management?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: D — Give rapid intravenous adenosine with monitoring

Stable regular narrow-complex tachycardia consistent with SVT should be treated with vagal manoeuvres followed by rapid IV adenosine if vagal manoeuvres fail. Cardioversion is appropriate if unstable or refractory. Oral therapy and discharge are unsafe while symptomatic tachycardia persists.

Reference: Heart and Stroke Foundation ACLS; CCS arrhythmia resources