skip to main content

Truncus Arteriosus — RACP Paediatrics MCQ

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

ModerateCardiologyTruncus ArteriosusRACP Paediatrics

A neonate presents with severe cyanosis. Echocardiography shows a single large arterial trunk arising from the heart, overriding a large VSD. What is the diagnosis?

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

Reveal the answer and explanation

Correct answer: C — Truncus arteriosus

Truncus arteriosus (persistent truncus) is a single arterial trunk giving rise to the aorta, pulmonary arteries, and coronary arteries, with a large VSD. It requires early surgical repair (typically within the first few weeks of life) with VSD closure and RV-to-PA conduit.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: Truncus Arteriosus