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Sgarbossa's Criteria for MI in Left Bundle Branch Block

Concordant ST elevation > 1mm in leads with a positive QRS complex
No 0
Yes 5
Concordant ST depression > 1 mm in V1-V3
No 0
Yes 3
Excessively discordant ST elevation in leads with a negative QRS
In proportion to the preceding S-wave as determined by 1) at least 1 mm of ST elevation AND 2) an ST/S ratio <= -0.25.
No 0
Yes 2


Result Interpretation

Ranges Ranges

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