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. 2018 Feb 17;18(1):1–10. doi: 10.1016/j.tjem.2018.01.008

Table 2.

Modified Sgarbossa criteria 34 to recognize acute myocardial infarction in case of left bundle branch block.

  • •

    concordant ST elevation ≥1 mm in at least 1 lead

  • •

    concordant ST depression ≥1 mm in lead V1, V2 of V3

  • •
    disproportional/excessive discordance
    • o
      discordant ST elevation ≥1 mm and ratio ST/S ≤ −0,25
Some exceptions that can be considered as normal:
  • •

    Only positive concordance of T wave (eg. positive T wave with positive QRS complex in lead V5, V6 or I)

  • •

    Only negative concordance of T wave in maximum 1 precordial lead (eg. negative T wave with ST elevation and negative QRS complex in V3)