Conclusions:LADi,LAAi and LAVi which are more stable and reliable than LAD,LAA and LAV can express and reflect the shape and size of the left atrium accurately and sensitively according to different age groups.

• :体表面积标化的 L ADi、L AAi和 L AVi较传统指标 L AD、L AA和 L AV稳定可靠 ,按年龄段进行表达 ,更能准确和敏感地反映左房的大小及其变化