Calc Function

    • Calcs that help predict probability of a diseaseDiagnosis
    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
    • Suggested protocolsAlgorithm





    Chief Complaint


    Organ System


    Patent Pending

    Sgarbossa's Criteria for MI in Left Bundle Branch Block

    Criteria to diagnose acute MI in patients with prior LBBB.

    It's often difficult to identify an MI for patients with existing left bundle branch blocks (LBBB). About 1 in 200 patients with MI have LBBB. Sgarbossa's is a well accepted approach at determining which LBBB are having an MI.


    Please fill out required fields.

    Next Steps
    Creator Insights


    A score of 3 or more is 90% specific for MI, but not sensitive (36%). Therefore a positive score should be acted upon, but a lower score can not by itself rule out MI - maintain a high index of suspicion if the presentation is consistent with MI.


    Addition of the assigned points.

    Facts & Figures

    As mentioned, Sgarbossa's criteria does not rule out myocardial infarction in patients with pre-existing Left Bundle Branch Block (it is not sufficiently sensitive), but in patients with ≥ 3 points, it is specific for MI.

    Recently, Stephen Smith modified Sgarbossa Criteria looking at excessively discordant ST elevation and changing this slightly. This has been references by Dr. Sgarbossa herself (see third reference) and should now be included in Sgarbossa criteria.


    Dr. Elena Sgarbossa

    About the Creator

    Elena Sgarbossa, MD, is a board certified cardiologist and works as an independent medical and scientific writer/editor/translator. She is also a member of Editorial Board of the Journal of Electrocardiology. Dr. Sgarbossa previously worked in clinical cardiology and research at Rush-Presbyterian Medical Center and Cleveland Clinic.

    To view Dr. Elena Sgarbossa's publications, visit PubMed

    About the Creator
    Dr. Elena Sgarbossa