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Long QT syndrome — MRCPCH FOP MCQ

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ModerateCardiologyLong QT syndromeMRCPCH FOP

A 12-year-old girl collapses during swimming and recovers within one minute. Her father died suddenly aged 31 and examination is normal between episodes. What is the most appropriate investigation?

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Correct answer: D — 12-lead ECG with cardiology referral

Exertional syncope during swimming with a family history of sudden death is concerning for inherited arrhythmia such as long QT syndrome, so ECG and cardiology review are required. Vasovagal syncope usually has a prodrome and is not typically triggered by swimming. EEG is not the first-line test for suspected cardiac syncope. The pearl is that exertional syncope is cardiac until proven otherwise.

Reference: NICE CKS Syncope; ESC inherited arrhythmia guidance