Brugada Syndrome
Definition
Autosomal dominant genetic disorder, with a male preponderance, characterized by abnormal findings on the electrocardiogram (ECG) along with an increased risk of ventricular tachyarrhythmias and sudden cardiac death
Diagnostic Criteria
Brugada Syndrome: Typical ECG abnormalities AND one of the following clinical criteria:
- Documented ventricular fibrillation (VF) or polymorphic ventricular tachycardia (VT)
- Family history of sudden cardiac death at <45 years old
- Coved-type ECGs in family members
- Inducibility of VT with programmed electrical stimulation
- Syncope
- Nocturnal agonal respiration
Brugada Pattern: Typical ECG abnormalities without any clinical criteria
Brugada Pattern Types & ECG Features
- Type 1: Coved ST elevation ≥2mm in V1/V2 (most diagnostic)
- Type 2: Saddleback pattern with high take-off ST elevation at least 1mm with a positive or biphasic T wave
- Type 3: Saddleback or coved pattern with ST elevation <1mm
- ST-segment elevation in V1 and/or V2 with a coved ST-segment, sometimes described as a pseudo right bundle branch block

Key Investigations
- 12-lead ECG (higher precordial leads if needed)
- Electrolytes (hypokalemia increases risk)
- Provocation testing with sodium channel blockers (flecainide/procainamide)
- Echo/cardiac MRI to exclude structural disease
Management
Brugada Syndrome (ECG + symptoms):
- Continuous cardiac monitoring
- Admit with telemetry
- ICD implantation for cardiac arrest survivors or sustained VT
Brugada Pattern only (no symptoms):
- Cardiology consultation for outpatient management/provocative testing