NYHA and ACC/AHA Classifications for Heart Failure
| NYHA classification | ACC/AHA classification | ||
| Description | Class | Class | Description |
| — | A | High risk of developing heart failure but no functional or structural heart deficits | |
| No limitation and no symptoms from ordinary activity | I | B | Structural heart deficit but no symptoms |
| Mild limitation with activity and comfortable at rest or with mild exertion | II | C | Heart failure symptoms due to underlying structural heart deficit with medical management |
| Significant limitation with any activity and comfortable only at rest | III | C | Heart failure symptoms due to underlying structural heart deficit with medical management |
| Discomfort with any physical activity and symptoms occurring at rest | IV | D | Advanced disease requiring hospitalization, transplant, or palliative care |
| — | |||
Arrows indicate potential directions of stage progression. Horizontal alignment indicates corresponding stages between the 2 classifications.