LEJ-1全方向M型超声心动图对正常人左室局部收缩舒张功能的研究  

Left Ventricular Regional Systolic and Diastolic Function in Normal Subjects

作　　者：王青[1] 李越[1] 温朝阳[1] 王廉一[1] 

机构地区：[1]解放军总医院超声科,北京100853

出　　处：《中国医学影像技术》2003年第12期1672-1675,共4页Chinese Journal of Medical Imaging Technology

摘　　要：目的　采用全方向M型超声心动图测定左室各节段室壁的收缩、舒张功能参数 ,了解正常人左心室上、中、下三个节段不同室壁的短轴方向局部运动状况 ,作为进一步研究的正常对照。方法　国产LEJ 1全方向M型心动图系统 ,对胸骨旁左室短轴二尖瓣水平、乳头肌水平、心尖水平的二维图像进行采集和定标 ,用手动分析法对左室 16个室壁节段的运动曲线进行测量 ,测量参数包括 :收缩期最大运动幅度 (R) ,收缩末期室壁厚度 (Ts) ,舒张末期室壁厚度 (Td) ,舒张三分之一时室壁厚度 (T1/3d) ,心内膜舒张早期运动速度 (Vd)与收缩期最大运动速度 (Vs) ,以及心电图R波顶点到室壁舒张开始的时间间隔 (R d) ,每种测定取连续三次测量的平均值 ,并计算室壁增厚率 (△T % )、舒张早期运动速度与收缩期最大运动速度的比值 (Vd/Vs)及舒张三分之一时室壁变薄率 (△T1/3d % ) ,以及 16节段室壁R d的最大差值R D。结果　左室各节段室壁的局部功能指标平均测值 :R为 ( 8.97± 1.5 )mm ,△T %为 ( 5 6.47± 8.2 ) % ,Vs为 ( 3 8.0 7± 9.0 )cm/s ,Vd为 ( 4 7.67± 13 .9)cm/s ,Vd/Vs为 1.2 5± 0 .17,△T1/3d %为 ( 64 .84± 6.2 7) %。总体看 ,后壁各项指标测值较大 ,而室间隔的较小 ;中、上段室壁的收缩和舒张运动较心尖段强。Objective We measured the regional wall systolic and diastolic indexes on normal subjectives by omni-directional M-mode echocardiography to assess the left ventricular regional wall function and build a control group. Methods The study of short-axis sections at mitral valve level, papillary muscle level and apical level were recorded and analyzed by LEJ-1 omni-directional M-mode echocardiography system developed. The left ventricle was subdivided into 16 segments of three short-axis sections with wall range during systolic period (R), end-systolic thickness (Ts), end-diastolic thickness (Td), thickness at one-third relaxation period (T1/3d), systolic velocities (Vs), early-diastolic velocities (Vd) and time from ECG R wave to the beginning of diastole (R-d) of segmental walls were measured, and the percentage of wall thickening(△T%), the Vd/Vs ratio, the percentage of wall thinning in one-third relaxation period (△T1/3d%) of each wall were measured. The coefficient of variation of the R-d time (R-D) was calculated to determine the synchronicity of the regional beginning of diastole. Results The respective average values of all regional functional indexes in total segments were (8.97±1.5)mm (R), (56.47±8.2)% (△T%), (38.07±9.0)cm/s (Vs), (47.67±13.9)cm/s (Vd), (1.25±0.17) (Vd/Vs), (64.84±6.27)% (△T1/3d%).The values of posterior wall were more than those of other walls, the values of interventricular septum were less than those of other walls; the systolic and diastolic motions of basic and middle segments stronger than that of apical ones. Conclusion Omni-directional M-mode echocardiography was capable of detecting all segments of left ventricle quantitatively, and there were differences between normal ranges of the values of regional systolic and diastolic functional indexes.

关 键 词：全方向M型超声心动图 左心室功能 局部收缩功能 局部舒张功能 整体收缩功能 整体舒张功能 

分 类 号：R331.31[医药卫生—人体生理学] R540.45[医药卫生—基础医学]