Stage C: Symptomatic heart failure Class III: Marked limitation of physical activity The ACC/AHA system includes people who do not yet have heart failure but may be at risk for the condition.

The current version of the classification, as presented in the 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure, is described below. Stage A (At Risk for HF) Stage A is defined as ...

The ACC/AHA classification of heart failure has ... Once symptoms develop, stage C heart failure is present and stage B will never again be achieved. The NYHA classification, in contrast, can ...