Brugada syndrome Types 1, 2 and 3
There are three types of ECG presentations, referred to as type 1, type 2 and type 3 Brugada syndrome. The most typical (and diagnostic) is type 1 Brugada syndrome. The ST segment elevation has a coved shape (often described as “shark tail”) in V1, V2 or V3. The ST segment starts at the apex of the second R-wave and is downsloping (panel A). The T-wave is negative (inverted).
In type 2 and type 3 Brugada syndrome, the ST segment elevation is saddleback shaped (panels B and C). The difference between type 2 and type 3 is that the ST segment elevation in type 2 is elevated ≥2 millimeters (it is lower in type 3 Brugada syndrome).
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