Sgarbossa's criteria

Background

• Assesses likelihood that pt w/ chest pain and baseline LBBB is having a STEMI
• Criteria do NOT need to be found in contiguous leads
• RBBB should NEVER have ST elevation
• Low Sn, High Sp

Criteria

• ST elevation ≥1 mm in a lead with upward (concordant) QRS complex - 5 points
• ST depression ≥1 mm in lead V1, V2, or V3 - 3 points
• ST elevation ≥5 mm in a lead with downward (discordant) QRS complex - 2 points

Points

• ≥3 points = 98% probability of STEMI

Source

• Sgarbossa, American Heart Journal 2006