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[Brugada syndrome].

Isabelle Denjoy1, Fabrice Extramiana, Jean-Marc Lupoglazoff

  • 1Service de cardiologie, Hôpital Lariboisière, Paris. isabelle.denjoy@lrb.aphp.fr

Presse Medicale (Paris, France : 1983)
|April 21, 2007
PubMed
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Brugada syndrome, a heart condition causing sudden death, is linked to genetic mutations affecting sodium channels. Early diagnosis and defibrillator implantation are crucial for symptomatic patients.

Area of Science:

  • Cardiology
  • Genetics
  • Electrophysiology

Background:

  • Brugada syndrome presents with syncope or sudden death due to ventricular tachyarrhythmias in individuals with structurally normal hearts.
  • Electrocardiographic hallmarks include right bundle branch block and ST-segment elevations in leads V1-V3.
  • The syndrome exhibits autosomal dominant transmission with variable penetrance, and its prevalence is higher in Asian populations.

Purpose of the Study:

  • To summarize the clinical, electrocardiographic, and genetic characteristics of Brugada syndrome.
  • To discuss the diagnostic challenges and treatment strategies for both symptomatic and asymptomatic individuals.

Main Methods:

  • Review of clinical case studies and genetic analyses related to Brugada syndrome.
  • Analysis of electrocardiographic findings and their correlation with genetic mutations.

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  • Evaluation of treatment outcomes, particularly the role of automatic defibrillators.

    • Main Results:

    • Mutations in the SCN5A gene, encoding the sodium channel alpha subunit, are identified in approximately 25% of cases.
    • These genetic abnormalities lead to reduced sodium current density, exacerbating ECG abnormalities with sodium channel blockers.
    • Sudden death prevention in symptomatic patients necessitates automatic defibrillator implantation.

    Conclusions:

    • Brugada syndrome poses a serious prognostic risk, especially for symptomatic individuals.
    • Treatment decisions for asymptomatic patients without a family history remain complex.
    • Further research into SCN5A gene mutations and other contributing factors is warranted.