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

    ATRIA Stroke Risk Score

    Determines stroke risk in patients with atrial fibrillation.
    When to Use
    Why Use
    • Patients with atrial fibrillation with potential bleeding risks to help quantify stroke risk.
    • Patients who are apprehensive about anticoagulation to better understand their stroke risk.

    The ATRIA Stroke Risk score, like the CHA2DS2-VASc Score can help objectify stroke risk, and perform better than the more well-known CHADS2 Score.


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    Next Steps
    Creator Insights


    Patients should be evaluated for bleeding risk before initiating anticoagulation; risk of bleeding can be estimated using the HAS-BLED Score for Major Bleeding Risk or several other scores.


    Addition of the selected points; points assigned below:

    Facts & Figures

    Criteria Points without previous Stroke Points with Previous Stroke
    Age (Years) ≥85 +6 +9
    75 to 84 +5 +7
    65 to 74 +3 +7
    <65 +0 +8
    Sex Female +1 +1
    Male 0 0
    Comorbidities Diabetes +1 +1
    CHF +1 +1
    Hypertension +1 +1
    Proteinuria +1 +1
    eGFR<45 or ESRD +1 +1


    • Low risk of stroke (<1%): 0-5 points
    • Intermediate risk of stroke (1-<2%): 6 points
    • High risk of stroke (≥2%): >6 points
    Dr. Daniel Singer

    About the Creator

    Daniel Singer, MD, is a professor of medicine at Harvard Medical School and professor in the Department of Epidemiology at Harvard School of Public Health. He is also chief of the Clinical Epidemiology Unit in the General Medicine Division at Massachusetts General Hospital (MGH). Dr. Singer is internationally recognized for his research on prevention of stroke in atrial fibrillation (AF).

    To view Dr. Daniel Singer's publications, visit PubMed

    About the Creator
    Dr. Daniel Singer