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Three ECG repolarization patterns in the right precordial leads are recognized in the diagnosis of Brugada syndrome. | Three ECG repolarization patterns in the right precordial leads are recognized in the diagnosis of Brugada syndrome. | ||
'''Type I''' is the only ECG criterion that is diagnostic of Brugada syndrome. The type I ECG is characterized by a J elevation >=2 mm (0.2 mV) a | '''Type I''' is the only ECG criterion that is diagnostic of Brugada syndrome. The type I ECG is characterized by a J elevation >=2 mm (0.2 mV) a coved type ST segment followed by a negative T wave (see figure). Brugada syndrome is definitively diagnosed when a type 1 ST-segment is observed in >1 right precordial lead (V1 to V3) in the presence or absence of a sodium channel–blocking agent, and in conjunction with one of the following: | ||
*documented ventricular fibrillation (VF) | *documented ventricular fibrillation (VF) | ||
*polymorphic ventricular tachycardia (VT) | *polymorphic ventricular tachycardia (VT) |