10th May 2025

Diagnosis

Diagnostic criteria

• Type 1 ECG pattern occurring spontaneously
• Type 1 ECG provoked by class I anti-arrhythmic drugs with one additional clinical feature: documented ventricular tachycardia (VT) or ventricular fibrillation (VF), syncope of probable arrhythmic cause, family history of sudden cardiac death (SCD) before age 45, family history of brugada type 1 or nocturnal agonal respiration.

Clinical features

• Asymptomatic
• Syncope
• Aborted cardiac arrest due to VT/VF