WPW pattern — RACP Paediatrics MCQ

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EasyCardiologyWPW patternRACP Paediatrics

A 5-year-old is having a routine ECG. It shows a short PR interval (<120 ms) with a delta wave (slurred upstroke of the QRS complex) and widened QRS. The child is asymptomatic. What is the most likely ECG pattern?

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Correct answer: B — Wolff-Parkinson-White pattern

A short PR interval with a delta wave and widened QRS complex is the hallmark of Wolff-Parkinson-White (WPW) pattern, indicating the presence of an accessory pathway (bundle of Kent). While asymptomatic WPW may not require treatment, it carries a risk of SVT and rarely sudden cardiac death. Paediatric cardiology referral is indicated.

Reference: RCH Melbourne – 2023 – ECG Interpretation CPG; RACP Paediatric Curriculum – Cardiology