Figure 1. ECG of the patient 1 and patient 2 with Brugada syndrome (BrS) sign.
A: (Upper panel) ECG at rest and 10 minutes after 40 mg of Ajmaline in patient 1. After sodium channel block challenge, ECG shows accentuation of R′ and development of a type 1 ST segment elevation in V1 and V2 (arrows). (Lower panel) Clinical electrophysiology study on patient 1. Ventricular tachycardia/ventricular fibrillation (VT/VF) was inducible with two extrastimulis. B: ECG of patient 2. It shows spontaneous huge accentuation of R′ and type 1 ST segment elevation in V1, and V2 (arrows).