Brugada Syndrome: Difference between revisions
→Electrocardiographic criteria
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'''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, or nocturnal agonal respiration. | '''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, or nocturnal agonal respiration. | ||
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|+'''ST segment abnormalities in the different types of Brugada syndrome''' | |||
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! | |||
!Type I | |||
!Type II | |||
!Type III | |||
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!J wave amplitude | |||
|>= 2mm | |||
|>= 2mm | |||
|>= 2mm | |||
|- | |||
!T wave | |||
|negative | |||
|positive or biphasis | |||
|positive | |||
|- | |||
!ST-T configuration | |||
|coved type | |||
|saddleback | |||
|saddleback | |||
|- | |||
!ST segment (terminal portion) | |||
|gradually descending | |||
|elevated >= 1mm | |||
|elevated < 1mm | |||
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|} | |||