- Patients with an electrocardiographic pattern compatible with Brugada syndrome (ST segment elevation ≥2 mm in more than one right precordial lead (V1-V3), followed by a negative T waves) or a diagnosis of early repolarization (J point elevation of ≥1 mm in ≥2 contiguous inferior and/or lateral leads).
- Patients under diagnostic suspicion of the disease presenting some of the following characteristics: Subjects with a personal or familiar history of sudden death. Subjects with a history of syncope of unknown origin. Subjects with ventricular fibrillation of unknown origin.
- Relatives of patients with a genetic diagnosis of Brugada or J wave syndrome (familiar screening).