超声评价二尖瓣替换术保留瓣下结构对左心功能的影响

目的　采用超声评价二尖瓣替换术保留瓣下结构对术后左心功能的维护。方法　将 96例患者分为两组 ,其中 5 6例保留瓣下结构为观察组 ,4 0例按传统方法手术为对照组。应用HP 10 0 0型多功能心脏超声诊断仪分别在术前和术后 3个月测定左室射血分数 (EF)、左室短轴缩短率 (FS)、每搏量 (SV)、左室舒张末容量 (LVEDV)、左室收缩末容量 (LVESV)、左室舒张末内径 (LVd)、左室收缩末内径 (LVs)、左房腔内径 (LAD)等心功能多项指标。结果　术前两组间的EF、FS、SV、LVEDV、LVESV、LVd、LVs、LAD均无显著性差异 (P>0 0 5 )。术后两组LAD和LVd均较术前明显缩小 (P <0 0 5 ) ,术后观察组EF、FS、SV等心功能多项指标明显优于对照组。结论　二尖瓣替换术保留瓣下结构有益于术后左心功能的维护。

Evaluating the effect of left ventricular function after mistral valve replacement with preservation of the posterior leaflet by ultrasonography

Objective To evaluate the effect of left ventricular function after mistral valve replacement with preservation of the posterior leaflet by ultrasonography.Methods 96 patients were divided into 2 groups. The patients in experimental group (n=56) underwent mistral valve replacement with preservation of the posterior leaflet and those in control group (n=40) underwent traditional operation. All patients were examined by HP-1000 multifunctional cardiac ultrasonic diagnostic apparatus before and after operations. Ejection fraction of left ventricle (EF), fraction shortening of left ventricle (FS), stroke volume (SV), left ventricular end diastolic volume (LVEDV), left ventricular end systolic volume (LVESV), left ventricular end diastolic diameter (LVd), left ventricular end systolic diameter (LVs) and left atrium diameter (LAD) were recorded.Results The values of EF, FS, SV, LVEDV, LVESV, LVd, LVs and LAD were no significant difference between two groups before operations (P>0.05). The values of LAD and LVd reduced in evidence after operations(P<0.05). The values of EF, FS, and SV of experimental group were better than those of control group.Conclusion Mistral valve replacement with preservation of the posterior leaflet is beneficial to left ventricular function after operation.