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LQT1 Swimming Risk — EECC MCQ

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HardArrhythmia & ElectrophysiologyLQT1 Swimming RiskEECC

A 35-year-old woman with genetically confirmed LQT1 takes nadolol reliably and asks about competitive open-water swimming. What advice is most appropriate?

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

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Correct answer: C — Competitive swimming remains a genotype-specific high-risk trigger

KCNQ1-related LQT1 events are characteristically triggered by adrenergic exercise, particularly swimming and diving. Beta-blockade reduces but does not abolish risk; competitive participation requires specialist shared decision-making, emergency planning and avoidance of unsupervised water exposure.

Reference: https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines