Left Bundle Branch Block
Last modified: 08 March 2021, 3:28:30 PM AEDT
Original Sgarbossa Criteria1 / 3
- described by Sgarbossa in 1996
- for diagnosing STEMI in LBBB
- 3 criteria
- Concordant STE > 1mm in leads with a positive QRS complex (score 5)
- Concordant ST depression > 1 mm in V1-V3 (score 3)
- Excessively discordant ST elevation > 5 mm in leads with a -ve QRS complex (score 2).
- score 3+ is 90% specific for AMI
Modified Sgarbossa Criteria2 / 3
- modified by Smith in 2012
- 3 criteria
- 1+ lead with ≥1 mm of concordant STE
- 1+ lead of V1-V3 with ≥ 1 mm of concordant STD
- 1+ lead anywhere with ≥ 1 mm STE and proportionally excessive discordant STE, as defined by ≥ 25% of the depth of the preceding S-wave.