Cardiology · Emergency Medicine
Modified Sgarbossa Criteria (Smith 2012) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
Complete all required inputs to calculate the score.
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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