目的：探讨心肌矢量应变（Xstrain）技术在检测扁桃体腺样体肥大患儿心脏功能方面的应用价值。方法：应用心肌矢量应变技术对35例扁桃体腺样体肥大患儿（病例组）和20例年龄匹配的正常儿童（对照组）左心室室壁各节段心肌纵向、径向、圆周方向运动和右室三尖瓣环运动进行检测。结果：①三尖瓣环运动速度比较：病例组收缩期及舒张早期三尖瓣环运动速度高于对照组。②圆周方向运动速度比较：病例组左室侧壁、后壁中间段收缩期和舒张期圆周方向运动速度低于对照组。③纵向运动速度比较：病例组左室壁基底段收缩期和舒张早期运动速度高于对照组。④径向运动速度比较：两组间差异无显著性。结论： Xstrain技术可以早期发现扁桃体腺样体肥大患儿心脏功能的改变，为儿童扁桃体腺样体肥大疾病心血管方面的评价及临床治疗提供可靠依据。［中国当代儿科杂志，2009，11（5）：377-379］

OBJECTIVE: To study the value of Xstrain technology in the evaluation of cardiac function in children with tonsil adenoidal hypertrophy (TAH). METHODS: Thirty-five children with TAH (TAH group) and 20 normal age-matched children (control group) were enrolled. The left ventricular wall movement in the vertical, radial and circumferential directions and the right ventricular tricuspid annulus movement were detected using Xstrain technology. RESULTS: The systolic and early diastolic velocities of tricuspid annulus in the TAH group were higher than those in the control group. The systolic and diastolic circumferential velocities of the middle lateral wall and back wall of left ventricular in the TAH group were lower than those in the control group. The systolic and early diastolic vertical velocities of the basement of left ventricular wall in the TAH group were higher than those in the control group. There was no significant difference in the radial velocity between the two groups. CONCLUSIONS: Early changes in the cardiac function can be found by Xstrain technology in children with TAH. Xstrain technology can provide a reliable basis for cardiovascular evaluation in children with TAH.［Chin J Contemp Pediatr, 2009, 11 (5):377-379］