改进的解剖M型超声检测肾功能不全患者左心室径向应变率  

Assessment of radial strain rate in the patients with renal dysfunction by improved-anatomic M-mode ultrasound

作　　者：张筠[1] 李越[2] 曹军英[1] 

机构地区：[1]沈阳军区总医院特诊科,沈阳110016 [2]解放军总医院超声诊断科

出　　处：《中华医学超声杂志（电子版）》2008年第6期10-13,共4页Chinese Journal of Medical Ultrasound(Electronic Edition)

摘　　要：目的探讨改进的解剖M型超声左心室径向应变率在评价伴室壁增厚的肾功能不全患者局部心功能方面的应用价值。方法对31例正常人及20例伴室壁增厚的肾功能不全患者,行超声心动图扫查左心室短轴乳头肌平面,获取前间隔、后壁、后间隔、侧壁、前壁、下壁6个室壁节段的解剖M型曲线,将上述M型曲线输入改进的解剖M型后处理系统,提取各室壁内膜、外膜的峰值运动速度,计算收缩期峰值径向应变率及舒张早期峰值径向应变率,并进行组间对比分析。结果伴室壁增厚的肾功能不全患者各室壁舒张期峰值径向应变率均小于正常对照组(P<0.05);虽然收缩期各节段峰值径向应变率均小于对照组,但6个节段的平均值以及后壁、后间隔、侧壁收缩期峰值应变率与正常对照组相比差异无统计学意义(P>0.05)。结论采用改进的解剖M型超声检测左心室短轴径向应变率,有助于对肾功能不全伴左心室壁增厚患者的心功能进行早期评估。Objective To assess the value of radial strain rate （SR） based on improved anatomic M-mode ultrasound in evaluating regional cardiac function of hypertrophic myocardium in the patients with renal dysfunction. Methods The thirty-one healthy subjects and 20 patients with renal dysfunction with hypertrophic myoeardium were enrolled to be examined by the improved anatomic M-mode curves in 6 segments （anteroseptal, posterior, inferoseptal, lateral, anterior, inferior） in the middle short-axis view. Then these curves were transferred into the improved AMM post-disposing system. The myocardial velocities in subendocardium and subepicardium by post-processing station were obtained. Radial SR could be estimated by SR = （velocity of endoeardium-velocity of epicardium ）/ regional wall thickness. Results The peak of six segments of diastolic and systolic radial SR in patients with renal dysfunction was significantly smaller than those in the control groups （ P 〈 0.05 ）. However, there were no significant differences in 6 segments of mean peak systolic SR and peak systolic SR in posterior, inferoseptal and lateral wall （ P 〉 0. 05 ）. Conclusions The radial SR derived from improved AMM could be helpful for assessment of changes in the patients with early cardiac function complicated with inerassated left ventricular wall.

关 键 词：超声心动描记术 肾功能衰竭 左心室功能障碍 

分 类 号：R445.1[医药卫生—影像医学与核医学] R692.5[医药卫生—诊断学]