斑点追踪技术评价室间隔缺损患儿右心室收缩功能

目的：探讨应用二维斑点追踪技术（2D-STI）的应变、应变率参数评价室间隔缺损（VSD）患儿右心室收缩功能的价值.方法：单纯VSD患儿40例按是否合并肺动脉高压（PH）进行分组：分为VSD无PH组及VSD伴PH组.以30例健康儿童为对照组.测量右室常规参数.应用2D-STI测量右室游离壁的峰值应变,收缩期应变率.结果：VSD伴PH组与VSD无PH组及正常对照组比较：右室的舒张末期面积及收缩末期面积增大,差异有统计学意义.右室各节段及整体的峰值应变、峰值应变率减低,差异有统计学意义（P＜0.05）,VSD无PH组与正常对照组比较无统计学差异（P＞0.05）.结论：VSD合并PH时右室收缩功能减低.二维斑点追踪技术的应变、应变率参数对VSD患儿右心室收缩功能的评价具有重要意义.

Evaluation of right ventricular systolic function in children with ventricular septal defect by speckle tracking imaging

Objective：To explore the value of two-dimensional speckle tracking imaging（2D-STI） strain in evaluating right ventricular systolic function in children with ventricular septal defect （VSD）.Methods：Forty simple VSD patients and thirty healthy children were included in this study.According to VSD,the patients were divided into two groups：VSD without pulmonary hypertension （PH） group and VSD with PH group.Conventional parameters of right ventricular were measured.Right ventricular peak strain,systolic strain rate application with 2D-STI were measured.Results：Compared with control group and VSD without PH group,right ventricular end-diastolic area and end systolic area increased in VSD with PH group （P＜0.05）,and the difference was statistically significant.Peak strain and peak strain rate in each section and the globle right ventricle decreased,the difference was statistically significant（P＜0.05）.Compared with control group,it showed no signigicant differences in VSD without PH group（P＞0.05）.Conclusions：The VSD with PH has decreased fight ventricular systolic function.To evaluate right ventricular systolic function of VSD in children,2D-STI parameters of strain and strain rate are of great significance.