脉冲组织多普勒超声评估哮喘患儿右室功能变化的探讨

目的应用脉冲组织多普勒技术(PW-TDI)评估哮喘患儿在发作期及缓解期的右室功能状态。方法哮喘患儿36例,分别于哮喘发作期和缓解期进行常规超声心动图检查后,启动PW-TDI模式,获取三尖瓣环处心肌运动频谱测定右室功能相关参数(Sm、e峰、a峰的峰值速度及e/a比值),测量等容收缩时间(ICT)、射血时间(ET)及等容舒张时间(IRT)并计算Tei指数,所有参数进行组间比较。结果与缓解期比较,哮喘患儿发作期右室功能相关参数Sm、e峰峰值速度、e/a比值及Tei指数有显著差异(P<0.05)。结论①哮喘患儿发作期右室功能受损。②应用PW-TDI技术评估.哮喘患儿右室功能可提供客观依据。

Right ventricular function in asthmatic children determined with PW-TDI

Objective To assess the right ventricular function of asthmatic children in onset period or remission period by using PW-TDI.Method 36 children with confirmed asthma were enrolled.In tricuspid annular,the ECHO were recorded with PW-PDI pattern to obtain right ventricular function(Sm,e-peak,Vmax for a-peak,and e/a),ICT,ET,IRT and Tei-Index.These were carried out in acute attack period and stable period.Result Right ventricular function parameter(Sm,Vmax for e-peak,Vmax for a-peak,e/a and Tei-Index) in acute attack period were significant different compared to those in stable period(P<0.05).Conclusions The right ventricular function was impaired in patients with asthma in acute attack period.PW-TDI is helpful for assessing right ventricular function to asthmatic children.