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应用超声心动图（ＵＣＣ）对３１例风湿性二尖瓣狭窄（ＭＳ）患者经皮球囊二尖瓣成形术（ＰＢＭＶ）前后的左室功能进行了对比研究，旨在评价ＰＢＭＶ的治疗效果。结果显示：二尖瓣口面积（ＭＶＡ）明显增加（Ｐ＜０．０５）；左室舒张末容积（ＥＤＶ）、每搏输出量（ＳＶ）、心输出量（ＣＯ）和射血分数（ＥＦ）均明显增加（Ｐ均＜０．０１）；而左室收缩末期容积（ＥＳＶ）无变化（Ｐ＞０．０５）。说明ＰＢＭＶ可有效地增加ＭＶＡ及二尖瓣口血流量，通过增加ＥＤＶ来提高ＳＶ、ＣＯ、和ＥＦ，从而改善左室泵血功能；ＵＣＧ可定量地评价ＰＢＭＶ前后的心功能变化。
The application of echocardiography (UCC) in 31 patients with rheumatic mitral stenosis (MS) before and after percutaneous balloon mitral valvuloplasty (PBMV) were compared left ventricular function, to evaluate the therapeutic effect of PBMV. The results showed that the MVA increased significantly (P <0.05); the left ventricular end diastolic volume (EDV), stroke volume (SV), cardiac output (CO) and ejection fraction ) Were significantly increased (P <0.01), while the left ventricular end-systolic volume (ESV) had no change (P> 0.05). PBMV can effectively increase MVA and mitral valve blood flow, increase SV, CO, and EF by increasing EDV to improve left ventricular pumping function; UCG can quantitatively evaluate changes of heart function before and after PBMV.