What is the Brugada syndrome?

Area of Science:

• Cardiology
• Genetics
• Electrophysiology

Background:

• Brugada syndrome presents with idiopathic ventricular arrhythmias and a characteristic ECG pattern (right bundle branch block, ST-segment elevation V1-V3).
• This condition, often inherited and affecting males, is not explained by structural heart disease, ischemia, or electrolyte imbalances.
• It is linked to repolarization abnormalities in the right ventricle, predisposing to arrhythmias.

Purpose of the Study:

• To describe the key features, diagnosis, and management of Brugada syndrome.
• To highlight the genetic basis and potential diagnostic confusion with other cardiac conditions.

Main Methods:

• Review of clinical presentations, electrocardiographic findings, and genetic associations.
• Differential diagnosis considerations, particularly arrhythmogenic right ventricular cardiomyopathy.

Main Results:

• Brugada syndrome is characterized by syncope or cardiac arrest due to ventricular tachycardia/fibrillation, often at rest or during sleep.
• A missense mutation in the cardiac sodium channel gene SCN5A has been identified as a cause.
• The typical ECG pattern can mimic other conditions, necessitating careful exclusion of structural heart disease.

Conclusions:

• Brugada syndrome requires a high index of suspicion and careful diagnostic exclusion of other causes.
• Implantable cardioverter-defibrillators are essential for preventing sudden death in affected individuals.
• Genetic testing and awareness of differential diagnoses are critical for effective management.