Brugada syndrome.

Area of Science:

• Cardiology
• Genetics
• Electrophysiology

Background:

• Brugada syndrome is characterized by specific ECG abnormalities (right bundle branch block, ST elevation V1-V3) and risk of sudden cardiac death.
• It affects individuals with structurally normal hearts and can present asymptomatically or with syncope.

Purpose of the Study:

• To define Brugada syndrome, an entity first described in 1992.
• To highlight its genetic basis and link to myocardial sodium channel defects.
• To emphasize the critical role of the cardioverter-defibrillator in preventing sudden death.

Main Methods:

• Clinical observation and electrocardiographic analysis.
• Genetic studies identifying mutations in the SCN5A gene.
• Review of patient histories including syncopal episodes and family history of sudden death.

Main Results:

• Brugada syndrome presents with characteristic ECG patterns and carries a risk of syncopal episodes and sudden cardiac death.
• The condition is genetically determined, linked to mutations in the myocardial sodium channel (SCN5A).
• Asymptomatic individuals may show only ECG abnormalities.

Conclusions:

• Brugada syndrome is a distinct genetic cardiac disorder.
• Implantation of a cardioverter-defibrillator is the only proven method to prevent sudden death in affected individuals.