Brugada Syndrome: Difference between revisions
→Electrocardiographic criteria
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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 criterium that is diagnostic of Brugada syndrome. Type I repolarization is characterized by a coved ST-segment elevation >=2 mm (0.2 mV) followed by a negative T wave (see figure). Brugada syndrome is definitively diagnosed when a type 1 ST-segment elevation 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) | '''Type I''' is the only ECG criterium that is diagnostic of Brugada syndrome. Type I repolarization is characterized by a coved ST-segment elevation >=2 mm (0.2 mV) followed by a negative T wave (see figure). Brugada syndrome is definitively diagnosed when a type 1 ST-segment elevation 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) | |||
*polymorphic ventricular tachycardia (VT) | |||
*a family history of sudden cardiac death at <45 years old | |||
*coved-type ECGs in family members | |||
*inducibility of VT with programmed electrical stimulation | |||
*syncope | |||
*nocturnal agonal respiration. | |||
Electrocardiograms of Brugada patients can change over time from type I to type II ECGs and back. | |||
A type III ECG is rather common and is concidered a normal variant. | |||
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