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453 bytes added ,  16:41, 29 November 2007
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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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{| class="wikitable" font-size="90%"
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|- style="text-align:center;background-color:#6EB4EB;"
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|+'''ST segment abnormalities in the different types of Brugada syndrome'''
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|-
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!
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!Type I
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!Type II
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!Type III
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|-
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!J wave amplitude
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|>= 2mm
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|>= 2mm
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|>= 2mm
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|-
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!T wave
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|negative
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|positive or biphasis
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|positive
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|-
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!ST-T configuration
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|coved type
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|saddleback
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|saddleback
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|-
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!ST segment (terminal portion)
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|gradually descending
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|elevated >= 1mm
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|elevated < 1mm
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|-
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|}
     
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