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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
07:15

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation

Published on: January 16, 2019

[Long QT syndrome: an underestimated cause of sudden infant death]

A-E Baruteau1, J Baruteau, R Baruteau

  • 1Département de cardiologie et maladies vasculaires, hôpital de Pontchaillou, centre hospitalier universitaire de Rennes, 35033 Rennes cedex, France. alban.baruteau@wanadoo.fr

Archives De Pediatrie : Organe Officiel De La Societe Francaise De Pediatrie
|February 17, 2009
PubMed

Insights

Congenital long QT syndrome (LQTS), an inherited arrhythmia, is linked to 10-12% of sudden infant death syndrome (SIDS) cases. Screening relatives and neonates could improve LQTS diagnosis and prevention.

Area of Science:

  • Cardiology
  • Genetics
  • Pediatrics

Context:

  • Congenital long QT syndrome (LQTS) is an inherited cardiac arrhythmia predisposing individuals to sudden cardiac death, particularly in neonates.
  • Postmortem studies indicate 10-12% of sudden infant death syndrome (SIDS) cases may be attributable to undiagnosed congenital LQTS.
  • Current etiological investigations for SIDS often miss LQTS diagnoses.

Purpose:

  • To highlight the underdiagnosis of congenital LQTS in SIDS cases.
  • To propose enhanced screening strategies for LQTS, including family history and electrocardiographic evaluation.
  • To advocate for neonatal screening for early LQTS identification and management.

Summary:

  • Congenital LQTS, a genetic arrhythmia, is a potential cause of SIDS, with 10-12% of SIDS cases linked to it.
  • Existing SIDS diagnostic methods do not adequately identify LQTS.
  • Implementing targeted questioning of first-degree relatives and electrocardiographic screening after SIDS incidents, alongside neonatal screening, can improve LQTS detection.

Impact:

  • Improved diagnostic yield for LQTS in SIDS cases.
  • Facilitation of early identification and management of LQTS in at-risk infants and families.
  • Potential reduction in SIDS mortality through proactive LQTS screening and intervention.

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