New York Heart Association Functional Classification

The New York Heart Association (NYHA) Functional Classification provides a simple way of classifying the extent of heart failure. It places patients in one of four categories based on how much they are limited during physical activity:

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I No symptoms and no limitation in ordinary physical activity.

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II Mild symptoms and slight limitation during ordinary activity.Comfortable at rest.

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III Marked limitation in activity due to symptoms, even during less-than-ordinary activity.Comfortable only at rest.

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IV Severe limitations. Experiences symptoms even while at rest.

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