Heart Failure Stages as Defined by Classification System of American College of Cardiology and American Heart Association
| Stage | Risk factors for HF | Structural/functional heart disease | History of HF | Clinical congestive HF |
| Normal | No | No | No | — |
| Stage A | Yes | No | No | — |
| Stage B | — | Yes | No | No |
| Stage C1 | — | Yes | No | Yes |
| Stage C2 | — | Yes | Yes | — |
| Stage D | — | Yes | Yes | Yes |