Figure 1. Electrocardiogram obtained 2 years before the current visit. The electrocardiogram shows a normal sinus rhythm with an incomplete right bundle branch block, a frequently observed finding. However, ST elevation in lead V2 is <1 mm, displaying a saddleback pattern characteristic of type 3 Brugada electrocardiographic pattern.
Figure 3. Electrocardiogram following pilsicainide administration for paroxysmal atrial fibrillation. The electrocardiogram demonstrates the restoration of normal sinus rhythm. However, lead V2 reveals a prominent coved-type ST-segment elevation measuring ≥2 mm, followed by an inverted T wave, consistent with a type 1 Brugada electrocardiographic pattern.
Figure 4. Electrocardiogram 4 days after pilsicainide administration. Restoration of sinus rhythm on the electrocardiogram following pilsicainide administration.
