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

    TIMI Risk Score for STEMI

    Estimates mortality in patients with STEMI.
    When to Use
    Why Use

    A patient with an STEMI who is post-cath may have bleeding risks and the primary team would like to help objectify risk-benefit of post-PCI medications.

    • Obviously patients with STEMI are already at high risk for complication and bad outcome, including death.
    • The TIMI Risk Score for STEMI may help a cardiology, medical and/or intensive care team with weighing risk/benefit of medications (like anticoagulation) and invasive procedures by knowing a patient’s baseline risk.
    • This score was developed based on thrombolytic outcomes, which likely have worse outcomes when compared to PCI.
    • Should be used in patients with diagnosed STEMI, NOT to evaluate patients with chest pain.

    Studies on clinician gestalt estimating mortality and complication risk often underestimate risk, and guidelines recommend higher risk patients receiving more aggressive medical interventions.


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    Next Steps
    Creator Insights


    STEMI patients should obviously undergo PCI or thrombolysis, depending on availability and standard of care at one’s hospital; risk stratification can be performed after this most critical first step.


    Addition of the assigned points.

    Facts & Figures

    Criteria Value
    Age < 65 years 0
    Age 65-74 +2
    Age ≥ 75 +3
    DM or Hypertension or Angina +1
    Systolic BP < 100 mmHg +3
    Heart Rate > 100 +2
    Killip Class II-IV +2
    Weight < 67kg (147.7 lbs) +1
    Anterior ST Elevation or LBBB +1
    Time to Treatment > 4 hours +1

    Evidence Appraisal

    • The TIMI Score for STEMI was developed from the InTIME II trial of 15,000 STEMI patients and was studying these patients for thrombolytics
    • It did not include patients with cardiogenic shock nor severe hypertension (> 180/>110)
    • Its primary endpoint was 30-day all-cause mortality and did not include a placebo arm
    • Because it was a thrombolytics trial, it obviously did not include patients undergoing percutaenous coronary intervention (PCI), which provides better outcomes when readily available.
    • This score also included patients with left bundle branch block, which was thought to be a STEMI equivalent; a new left bundle is no longer considered to be a “STEMI equivalent” especially considering Sgarbossa Criteria.


    Dr. David A. Morrow

    About the Creator

    David A. Morrow, MD, MPH, is an associate professor at Harvard Medical School and the director of the Samuel A. Levine Cardiac Unit at Brigham and Women's Hospital in Massachusetts. He is a senior investigator in the TIMI Study Group with a research focus in the management of unstable and stable coronary artery disease, and he directs the TIMI Biomarker Program. Dr. Morrow has more than 150 publications in areas such as risk stratification in patients with ischemic heart disease.

    To view Dr. David A. Morrow's publications, visit PubMed

    About the Creator
    Dr. David A. Morrow