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      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

    New York Heart Association (NYHA) Functional Classification for Heart Failure

    Stratifies severity of heart failure by symptoms.
    When to Use

    Patients with signs and symptoms of heart failure.

    • Often criticized for being outdated, subjective, and with limited reproducibility (56% according to one study by Goldman et al). Nevertheless, it is still commonly used in both research and clinical settings.
    • Functional class is not necessarily linked to treatment strategy; the more modern ACC/AHA Heart Failure Staging is one attempt to bridge the gap.
    No limitation of physical activity; ordinary physical activity does not cause undue fatigue, palpitation, or dyspnea
    Slight limitation of physical activity; comfortable at rest; ordinary physical activity results in fatigue, palpitation, or dyspnea
    Marked limitation of physical activity; comfortable at rest; less than ordinary activity causes fatigue, palpitation, or dyspnea
    Unable to carry on any physical activity without discomfort; symptoms of heart failure at rest; if any physical activity is undertaken, discomfort increases


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    Next Steps
    Creator Insights


    Use objective measures of heart failure severity such as echocardiography and 6 Minute Walk Distance to further stratify functional capacity and make treatment decisions.

    About the Creator
    Dr. Martin Dolgin
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