二尖瓣口三维力与左房能量和能量效率关系的研究

目的：研究二尖瓣口充盈力学的三维效应与瓣口狭窄和左房能量的关系。方法：应用牛顿力学定律把力学效应的强度维、时间维和空间维映射到立体坐标系中，按三维模型构筑三维力效应图并求得三维力（３ＤＦ）、另按压力－容积势能理论求得左房总能量（ＴＥ）和能量效效率（ＥＥ），用二维多普勒超声对自然瓣、狭窄瓣和机械瓣的瓣口冲力（Ｆ），冲量（Ｉ）、充盈功（Ｗ）和３ＤＦ与瓣口面积（ＭＶＡ）、ＴＥ和ＥＥ作对比研究。结果：三种

Studies on relationship between mitral three-dimensional force and left atrial energy and energy efficiency

Objective:To study the associations between three-dimensianal effect of mitral filling force and valvular stenotic degrees and left atrial enerny and enerny efficiency. Methods: By applying the law of Newton mechanics, intensity-dimension, time-dimension and spacial dimension of force effect were put into stereo coordinate system and three-dimensional figure of force effect were drawed up and three-dimensional force(3DF)was calculated according to three-dimensional model,Total energy(TE)and energy efficiency(EE)of left atrium were calculated by the theory of pressure-volume potential energy,By 2-dimensional Doppler echocardiography impulse force(F),impulse(I),filling work(W)and 3DF in the matural,the stenotic and the mechanical valve were studied by comparison with mitral valve area(MVA),TE and EE,Results:I,W and 3DF of three kinds of different mitral valves had significant difference.There were better relatipnships and classificated quantitative associations between 3DF and MVA,TE as well as EE,but F had no significant defference between the stenotic valve group and the mechanical valve group and presented an double-direction changes of early ascending and late descending as MVA decreasing and were less correlated with the latter three indexes.Conclusion:3DF in comparison with F had a significant superiority for evaluating mitral valvular filling dynamics and changes of left atrial energy.