There were 7 patients of whom the ratio E/A was beyond 2,however,the index of DT,IRT ,S and S/D were lower than control persons in mitral flow and pulmonary venous flow.

• 有7例二尖瓣血流频谱E/A>2,DT,IRT值减低,肺静脉血流频谱S值显著减低,S/D值显著减低。