TABLE 1

Heart failure stages and functional classes

NYHA class I
No physical limitations		NYHA class II
Slight limitation of physical activity		NYHA class III
Marked limitation of physical activity		NYHA class IV
Symptoms at rest
Stage A
Patients at risk for heart failure
No structural disease		Stage B
Structural disease
No heart failure symptoms		Stage C
Structural disease
Heart failure symptoms		Stage D
End-stage disease

  • NYHA = New York Heart Association