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High-resolution Optical Mapping of the Mouse Sino-atrial Node
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Brugada syndrome and sinus node dysfunction.

Hidemori Hayashi1, Masataka Sumiyoshi2, Yuji Nakazato3

  • 1Department of Cardiovascular Medicine Juntendo University School of Medicine Tokyo Japan.

Journal of Arrhythmia
|June 29, 2018
PubMed
Summary
This summary is machine-generated.

Brugada syndrome (BrS), a heart condition, is often linked with sinus node dysfunction (SND). This review highlights that SND is a common co-occurring disorder in BrS patients, potentially stemming from shared genetic causes.

Keywords:
Brugada syndromeoverlap syndromesick sinus syndromesinus node dysfunctionsodium channel mutation

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Area of Science:

  • Cardiology
  • Genetics
  • Electrophysiology

Background:

  • Brugada syndrome (BrS) is a serious cardiac condition characterized by ventricular fibrillation.
  • While associations with atrial tachyarrhythmias are known, sinus node dysfunction (SND) in BrS is less understood.
  • Previous research has not extensively explored the link between BrS and SND.

Purpose of the Study:

  • This review aims to elucidate the association between Brugada syndrome and sinus node dysfunction.
  • To consolidate existing clinical, epidemiological, and genetic evidence regarding SND in BrS patients.
  • To explore the potential for BrS to be a broader arrhythmogenic disorder affecting multiple cardiac tissues.

Main Methods:

  • Literature review of clinical studies.
  • Analysis of epidemiological data on BrS and SND.
  • Examination of genetic evidence linking ion channel mutations to both conditions.

Main Results:

  • Sinus node dysfunction (SND) is a frequent co-occurring disorder in patients with Brugada syndrome (BrS).
  • Clinical, epidemiological, and genetic data support a significant association between BrS and SND.
  • Evidence suggests BrS may involve dysfunction beyond the His-Purkinje system and right ventricle, including the sinus node and atria.

Conclusions:

  • Sinus node dysfunction is not rare in Brugada syndrome.
  • The findings suggest Brugada syndrome may be a multi-system disorder affecting cardiac conduction.
  • Ion channel mutations are implicated as a potential underlying cause for both BrS and SND.