NYHA Functional Classification

No symptoms and no limitation in ordinary physical activity, e.g., no shortness of breath when walking, climbing stairs, etc.

Mild symptoms (mild shortness of breath and/or angina) and slight limitation during ordinary activity

Marked limitation in activity due to symptoms, even during less-than-ordinary activity, e.g., walking short distances (20-100 m). Comfortable only at rest

Severe limitations. Experiences symptoms even while at rest. Mostly bedbound patients