PBMV对左室几何构型,充盈方式及收缩功能的影响

本文对３９例ＰＢＭＶ患者进行了研究，比较了ＰＢＭＶ前后左室几何构、充盈方式及收缩功能指标的改变。结果表明，ＰＢＭＶ术后左房缩小，左室舒张末期容积及每搏容积增大，左室血分数及短径缩短率则无明显改变。ＰＢＭＶ后，二尖瓣口血流Ｅ峰及Ａ峰速率均明显下降，左室房缩期充盈比例增加，ＰＢＭＶ使二尖瓣狭窄患者的左室更超于椭圆从而改善了左室几何构型，相关分析表明，左室几何构型的改变与二尖瓣口的增加程序显著相关（Ｐ＝

The Influence of Percutaneous Balloon Mitral Valvuloplasty on Left Ventricular Geometry,Filling Pattern and Systolic Function

Left ventricular geometry,filling pattern and systolic function were evaluated in 39 patients troubled with mitral stenosis before and after percutaneous balloon mitral valvuloplasty (PBMV) by echocardio-graphy.which was performed within 24 hours before PBMV and 72 hours after PBMV.The results appeared that the left atrial dimension was significantly decreased,left ventricular end-diastolic volume and stroke volume were significantly increased(all P<0.001 ),left ventricular ejection fraction and fraction shortening unchanged. Both peak veleeities of E wave and A wave were decreased significantly (P<0. 001).left atrial filling fraction in-creased PBMV had a favorable influence on left ventricular geometry presented by increased ratio of left ventricu-lar short dimension to left ventricular long dimension. Linear regression analysis showed that both the changes of left ventricular geometry and peak velocity of A wave were correlated significtantly with the changes of mitral valve area(r=-0. 527 and 0.918,respectively;both P<0.01).PBMV has a favorable effect on left ventricular geometry,and the change of peak velocity of A wave might be the useful indicator of successful PBMV.