Table 1 NYHA classification for CHF symptoms

I

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

II

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

III

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

IV

Severe limitations, experiences symptoms even while at rest, mostly bed-bound patients