A.150m B.150~ 450m C.450m D.100m
A.LVEF<30% B.LVEF≥50% C.LVEF≥40%~49% D.LVEF<40%
A.NYHA分級 B.Forester分級:適用急性心力竭 C.KiLLip分級 D.6分鐘步行試驗(yàn)