The New York Heart Association (NYHA) classification is a method that doctors use to place people into 1 of 4 categories based on their symptoms of heart failure.
| NYHA Classification | Symptoms |
| Class I | No symptoms or exercise limitations |
| Class II | Mild symptoms, some exercise limitations |
| Class III | Noticeable symptoms with minimal physical activity; comfortable only at rest |
| Class IV | Severe symptoms while at rest |