Cardiology · Emergency Medicine
Modified Sgarbossa Criteria (Smith 2012) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
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Formula inputs
- ST-segment amplitude (mm)Accepted range: -20 to 20
- S-wave amplitude in the same lead (mm)Accepted range: 0 to 50
Primary source
Smith SW et al. Diagnosis of ST-elevation myocardial infarction in the presence of left bundle branch block with the ST-elevation to S-wave ratio in a modified Sgarbossa rule. Ann Emerg Med. DOI: 10.1016/j.annemergmed.2011.10.012. PMID: 22153973. Scope: modified Sgarbossa positive (1) when ST/S-wave ratio ≤ −0.25 in any lead with discordant ST deviation; otherwise negative (0). (2012)
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