TableĀ 4

Comparison of ACCF/AHA Stages of HF and NYHA Functional Classifications

ACCF/AHA Stages of HF (38)NYHA Functional Classification (46)
AAt high risk for HF but without structural heart disease or symptoms of HFNone
BStructural heart disease but without signs or symptoms of HFINo limitation of physical activity. Ordinary physical activity does not cause symptoms of HF.
CStructural heart disease with prior or current symptoms of HFINo limitation of physical activity. Ordinary physical activity does not cause symptoms of HF.
IISlight limitation of physical activity. Comfortable at rest, but ordinary physical activity results in symptoms of HF.
IIIMarked limitation of physical activity. Comfortable at rest, but less than ordinary activity causes symptoms of HF.
IVUnable to carry on any physical activity without symptoms of HF, or symptoms of HF at rest.
DRefractory HF requiring specialized interventionsIVUnable to carry on any physical activity without symptoms of HF, or symptoms of HF at rest.

ACCF indicates American College of Cardiology Foundation; AHA, American Heart Association; HF, heart failure; and NYHA, New York Heart Association.