Sgarbossa Criteria (AMI in LBBB)

Identifies acute myocardial infarction in patients with left bundle branch block (LBBB) or ventricular pacing. Original and modified (Smith-modified) criteria included.

Concordant ST Elevation >= 1mm *

Concordant ST Elevation >= 1mm

ST elevation >=1mm in leads with predominantly positive QRS complexes

Concordant ST Depression >= 1mm in V1-V3 *

Concordant ST Depression >= 1mm in V1-V3

ST depression in leads V1, V2, or V3

Excessively Discordant ST Elevation *

Excessively Discordant ST Elevation

ST elevation >=5mm in leads with negative QRS (original) or ST/S ratio >0.25 (modified)

Use Modified Sgarbossa Criteria

Uses ST/S ratio >0.25 instead of absolute 5mm threshold

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