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Drug-induced Brugada syndrome
P Goethals1, P Debruyne, M Saffarian
1Department of Cardiology, Algemeen Ziekenhuis Sint-Jan, Brussels, Belgium.
Acta Cardiologica
|October 30, 1998
Summary
Idiopathic ventricular fibrillation (VF) survivors may have Brugada syndrome, characterized by intermittent right bundle-branch block and ST-segment elevation. Early ECG screening is crucial for diagnosis and family member evaluation.
Area of Science:
- Cardiology
- Genetics
Background:
- Idiopathic ventricular fibrillation (VF) is diagnosed in sudden cardiac death survivors without structural heart disease or coronary artery disease.
- Electrocardiogram (ECG) analysis is critical for diagnosing unexplained sudden cardiac death.
Observation:
- Two patients with unexplained VF presented with intermittent right bundle-branch block (RBBB) and ST-segment elevation in precordial leads V1-V3.
- The Brugada syndrome ECG pattern exhibits dynamic changes and spontaneous normalization.
Findings:
- Class I antiarrhythmic drugs can unmask the Brugada ECG pattern and potentially precipitate arrhythmias.
- Screening for intermittent RBBB and ST-segment elevation is recommended for idiopathic VF patients.
Implications:
- Brugada syndrome is often familial, inherited in an autosomal dominant pattern.
- Diagnosing Brugada syndrome necessitates screening of at-risk family members to identify potential carriers and prevent sudden cardiac death.