超声斑点追踪成像评价法洛四联症患者右心室局部收缩功能

目的 应用超声斑点追踪成像技术评价法洛四联症患者右心室局部收缩功能.方法 正常对照组35例,法洛四联症患者38例.获取心尖四腔观,应用超声斑点追踪成像技术测量并记录右室游离壁及审间隔基底段、中间段、心尖段纵向收缩峰值速度(V)、收缩峰值应变(ε')、收缩峰值应变率(SRs),对结果进行组间比较.结果 法洛四联症患者右室游离壁及室间隔各节段ε、SRs较对照组均显著减低,差异有统计学意义(均P<0.05),而V与对照组比较差异无统计学意义(P>0.05);法洛四联症患者及对照组右室游离壁各节段V、ε、SRs测值均高于室间隔相应节段(心尖段SRs除外),差异有统计学意义.结论 法洛四联症患者右室收缩功能减低,超声斑点追踪成像技术可准确、客观地评价右室纵向收缩功能.

Assessment of right ventricular regional systolic function in patients with tetralogy of Fallot by ultrasound speckle tracking imaging

Objective To assess right ventricular(RV)regional systolic function in patients with tetralogy of Fallot(TOF)by ultrasound speckle tracking imaging(STI).Methods Longitudinal peak systolic velocity(V), strain(ε),strain rate(SRs)were measured in RV free wall and interventricular septum(IVS)for basal, mid and apical segment in 38 patients with TOF and 35 healthy controls by STI from the apical 4-chamber view and compared between groups.Results Compared with controls,ε and SRs of RV free wall and IVS for all segments were significantly impaired in patients with TOF(P<0.05 for all).Whereas, V of RV each segment were normal (P>0.05 for all).In patients with TOF and controls.V,εand SRs of RV free walI for all segments were higher than those of IVS except SRs of RV apical segment.Conclusions RV systolic function in patients with TOF was decreased, RV longitudinal systolic function is accurately and objectively studied by STI.