摘要
目的通过改进的解剖M型超声(AMM)径向应变率(SR)检测,评价正常人左室短轴局部心功能。方法获取31例健康志愿者左室短轴乳头肌平面6个室壁节段的解剖M型曲线,将曲线图像输入改进的解剖M型后处理系统,该系统可提取各室壁内、外膜的峰值运动速度。径向应变率=(内膜速度-外膜速度)/室壁厚度。结果正常人左室乳头肌平面各室壁节段舒张早期峰值径向应变率略高于收缩期,其中在下、后壁的差异显著(P<0.05);下壁、后壁、侧壁的收缩期及舒张早期峰值径向高于间隔侧及前壁。结论改进的解剖M型超声径向应变率检测可用于评价左室短轴各节段的局部心功能;正常人左室壁各节段径向应变率不是均匀一致的,可能与心肌的解剖结构特点有关。
Objective To assess regional myocardial function in normal subjects by radial strain rate （SR） based on improved anatomic M-mode （AMM） echocardiography. Methods The study included 31 healthy subjects. Anatomic M-mode curves of 6 segments were acquired at the mid short-axis view. Then we transported these curves into improved AMM postdisposing system. Myocardial velocities in subendocardium and subepicardium were obtained by postprocessing station. Strain rate could be estimated as follows： SR= （Vendocardium-Vepicardium）/Thickness. Results Peak systolic radial SR （SRs） and peak early diastolic radial SR （SRe） of inferior, posterior, lateral wall were higher than those of septal and anteior wall （P（0.05）. SRe was higher than SRs in all 6 ventricular segments walls and the differences were significant between inferior and posterior （P〈0.05）. Conclusion Our results may indicate that the method of radial SR based on AMM is able to detect heterogencity of myocardial properties which might be relevant with the characteristics of cardiac anatomic structures.
出处
《中国医学影像技术》
CSCD
北大核心
2008年第7期1044-1047,共4页
Chinese Journal of Medical Imaging Technology
关键词
超声检查
应变率
心室功能
左
Ultrasonography
Strain rate
Ventricular function, left
