ST segment elevation Saddle-back type ST segment elevation 2024-07-07T17:11:14Z ECG anomaly is only suggestive of Brugada syndrome. An ST-segment elevation of at least 0.5 mm (generally at least 2 mm in V2) in at least one right precordial lead (V1 to V3), followed by a convex ST. The r'-wave may or may not overlap the J point, but it has a slow downward slope. The ST segment is followed by a positive T-wave in V2 and is of variable morphology in V1.