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本文应用超声心动图测试36例单纯肺动脉瓣狭窄(PS)经PBPV治疗后4～7年的右心室容量变化,并和外科瓣膜切开及未经治疗的PS患儿相对照。结果显示:PBPV及外科瓣膜切开治疗后的右心室容量都较未经治疗组缩小;其中PBPV组的舒张末期右心室容量缩小较外科瓣膜切开组明显。PBPV组中,选用球/瓣比1.2～1.4(均值1.32±0.07)的患儿其右心室容量较选用其它球/瓣比例组为小。据此PBPV组达到和外科手术同样效果。采用球/瓣比1.3左右进行PBPV是值得推荐的。
In this study, 36 patients with pure pulmonary valve stenosis (PS) were tested for changes in RV volume 4 to 7 years after treatment with PBPV and compared with those treated with surgical valvuloplasty and untreated PS. The results showed that the volume of right ventricle after PBPV and surgical valvuloplasty was smaller than that of the untreated group, and the decrease of the right ventricular volume at the end diastole of PBPV group was more obvious than that of the surgical valvulotomy group. In the PBPV group, children with a ball / flap ratio of 1.2 to 1.4 (mean 1.32 ± 0.07) had smaller RV volumes than other ball / flap ratio groups. According to this PBPV group and surgery the same effect. PBPV using a ball / flap ratio of about 1.3 is recommendable.