This study implied that in patients with contractile reserve,the increment of EF,SV,CO,and CI depends on reducing ESV and ESVI and maintaining EDV and EDVI unchanged.

• 有收缩功能储备时 ,LDDSE提高EF、SV、CO、CI等整体心功能指标的途径是减少ESV、ESVI而保持EDV、EDVI不变。