VF Mapping in Brugada and Early Repolarization Syndromes

Inclusion Criteria: Patients presenting with the type1 BrS ECG or ER ECG signature pattern, with/without a sodium channel blocker. Patients with the following one of these symptoms or arrhythmias will be considered as symptomatic patients: 1) aborted cardiac arrest cases, 2) documented VF episodes, 3) agonal respiration during sleep with difficulty to arouse, 4) syncope of unknown origin, or 5) seizure suspected of arrhythmic origin.• Exclusion Criteria: Patients who refuse informed consent and to participate to the best ability in the study. Patients who have structural heart disease or concomitant medical illness.