摘要
目的采用定量组织多普勒速度成像技术(QTVI)分析新生儿左室壁各节段心肌长轴方向的收缩功能。方法应用QTVI测量30例足月儿和30例早产儿有无临床心功能不全表现,通过标准心尖左室四腔观、两腔观切面获得的左心室的4个室壁(侧壁、室间隔、前壁、下壁)基底段、中间段、心尖段心肌运动速度曲线,分别测量各节段心肌纵向收缩期峰值速度(Vs),然后进行对比分析。结果新生儿左室壁各节段Vs呈梯度变化,基底部瓣环处速度最高,中间部次之,心尖部最低,各节段之间存在显著差异。足月儿左室壁各节段Vs高于早产儿。结论QTVI技术能定量评价新生儿左室壁各节段心肌运动速度,足月儿左心室心肌运动速度高于早产儿。
Objective To analyze the systolic function along prolate axis of each segment of left ventricle in neonates by using quantitative tissue doppler imaging （QTVI）. Methods Thirty term infants and thirty preterm infants without heart insufficiency were detected by using QIVI. From the apical four chamber and two chamber views, the velocity curves of the basal, middle and apical segments of four left ventricular walls （lateral wall, interventricalar septum, anterior wall and inferior wall） were obtained, and the longitudinal peak myocardial velocity during systole （Vs） of each segment were respectively measured, then a comparative analysis was made. Results The Vs in the same ventricular wall became smaller progressively from basal to apical level in both term and preterm infants, there were significant differences in the Vs among the basal, middle and apical levels. The Vs of left ventricular segments of the term infant ware higher than that of preterm infants. Conclusion QTVI can quantitatively assess myocardial velocity of each segment of left ventricle in neonates. The longitudinal velocity of the left ventricle of the term infants is higher than that of preterm infants.
出处
《实用医技杂志》
2010年第1期12-13,共2页
Journal of Practical Medical Techniques
基金
深圳市福田区科技计划资助项目(FI200609)
关键词
超声成像
婴儿
新生
心肌运动
Ultrasonic imaging
Infant, newborn
Myocardial movement
