Modified Sgarbossa: Identifies acute MI in patients with LBBB or Ventricular Paced rhythms.
Concordant ST Elevation ≥ 1mm
ST elevation in a lead with a positive QRS complex (most specific).
Concordant ST Depression ≥ 1mm in V1-V3
ST depression in leads with negative QRS (V1, V2, or V3).
Discordant ST/S ratio ≤ -0.25
Excessive discordance: ST elevation height / S wave depth ≤ -0.25 (Modified Smith criterion).
Verified
Last Review: 2026
Last Comprehensive Review: 2026
Verified
Last Review: 2026
Last Comprehensive Review: 2026