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

    Disease

    Select...

    Specialty

    Select...

    Chief Complaint

    Select...

    Organ System

    Select...

    Patent Pending

    Log In

    Show
    Forgot your password?
    Log In
    Or create a new account (it's free)

    Forgot Password?

    Enter your email address and we'll send you a link to reset your password.

    Get New Password

    Sign In Required

    To save favorites, you must log in.

    Creating an account is free, easy, and takes about 60 seconds.

    Already have an MDCalc account?

    Login to link your favorites and recently used calcs

    Show
    Forgot your password?
    Log In
    Or continue to Nuance

    Attention COACH STUDY participants:

    The principal investigators of the study request that you use the official version of the modified score here.

    HAT (Hemorrhage After Thrombolysis) Score for Predicting Post-tPA Hemorrhage

    Assesses hemorrhage risk after tPA.
    When to Use
    Pearls/Pitfalls
    Why Use
    • The HAT Score can help determine risk/benefit of tPA in borderline cases for emergency and neurology providers.
    • It can also help determine which patients need the closest monitoring if given tPA.

    While symptomatic ICH definitions vary greatly, it is clear from several studies that increasing HAT Score correlates with increasing risk of symptomatic ICH and fatal ICH, from <5% at low scores to >10% at highest scores.

    The HAT Score can objectify tPA risk which is often difficult with gestalt alone, and provide patients and family members information about possible risk and benefit.

    No
    0
    Yes
    +1
    <15
    0
    15-20
    +1
    ≥20
    +2
    No
    0
    Yes, <1/3 of MCA territory
    +1
    Yes, ≥1/3 of MCA territory
    +2

    Result:

    Please fill out required fields.

    Next Steps
    Evidence
    Creator Insights
    Dr. Magdy Selim

    About the Creator

    Magdy Selim, MD, PhD, is chief of the Division of Stroke and Cerebrovascular Diseases at Beth Israel Deaconess Medical Center. He is also a professor of neurology at Harvard Medical School. His current research interests include cerebrovascular disease, brain imaging, and thrombolysis. His field of interest is advancing the diagnosis and improving the treatment of stroke, with a specific focus on developing new therapies for patients with a brain hemorrhage.

    To view Dr. Magdy Selim's publications, visit PubMed

    Are you Dr. Magdy Selim? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
    About the Creator
    Dr. Magdy Selim
    Are you Dr. Magdy Selim?