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Fever-induced life-threatening arrhythmias in children harboring an SCN5A mutation

Priya Chockalingam1, Lukas A Rammeloo, Pieter G Postema

  • 1Department of Cardiology, Heart Failure Research Centre, Academic Medical Centre, Meibergdreef 9, 1105AZ Amsterdam, Netherlands. p.chockalingam@amc.uva.nl

Pediatrics
|December 8, 2010
PubMed

Insights

Loss-of-function sodium channel mutations (SCN5A) can cause severe arrhythmias in infants, even during febrile episodes. Early detection and management are crucial for affected families.

Area of Science:

  • Cardiology
  • Genetics
  • Molecular Biology

Background:

  • Cardiac channelopathies, often caused by SCN5A mutations, are typically well-tolerated.
  • However, severe early-onset presentations highlight the need for broader diagnostic considerations.

Observation:

  • A previously healthy 4-month-old girl presented with life-threatening arrhythmias.
  • The affected infant, her brother, and father all carried an SCN5A mutation.

Findings:

  • Siblings experienced recurrent, serious arrhythmias triggered by febrile episodes, including those following immunization.
  • This suggests loss-of-function sodium channel mutations can manifest early in life.

Implications:

  • Early identification of SCN5A mutations is vital for managing pediatric arrhythmias.
  • Prompt antipyretic measures, monitoring during immunizations/fevers, and beta-blockers are key management strategies.

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