解剖M型超声心动图对正常儿童心房功能的初步研究

摘要

目的 应用解剖M型超声心动图分析正常儿童左、右心房和房间隔的机械功能特点.方法 随机选取正常儿童30例,取心尖四腔心切面,清楚显示左、右心房和房间隔,测量并计算心房及房间隔运动参数.结果 正常儿童心房及房间隔的运动参数随心动周期呈动态变化:心房壁在心室收缩期末最薄,于心室舒张期增厚,至心室舒张末期最厚；房间隔于心室收缩期末期突向右房,于心室舒张末期突向左房.左、右心房壁及房间隔厚度、增厚幅度比较差异无统计学意义；左、右心房最大横径比较差异无统计学意义；左心房最大横径缩短幅度大于右心房(P＜0.05).结论 解剖M型超声心动图可以动态分析正常儿童心房运动特点,为心房功能检测提供了新方法.%ABSTRACT Objective To assess the motion characteristics of left atrium,right atrium and interatrial septum in nornal children with anatomy M-mode echocardiography.Methods The left atrium,right atrium and interatrial septum of 30 normal children were clearly displayed on apical four-chamber view.The movement parameters of left atrium,right atrium and interatrial septum were measured and calculated.Results The movement parameters of atrium and interatrial septum were dynamically changeed with cardiac cycle.The atrial wall was thinnest in ventricular end-systolic phase,while thickest in ventricular enddiastolic phase.The interatrial septum protruded to right atrium in end-systolic phase,while protruded to left atrium in ventricular end-diastolic phase.There was no significant difference of atrial wall and interatrial septum thickness and thicken amplitude.There was no significant difference of atrium transverse diameter,the fractional shortening of left atrium was higher than that of right atrium (P ＜ 0.05).Conclusion Normal children's atrium movement characteristics can be dynamically analyzed with anatomy M-mode echocardiography,which provids a new method to assess the atrial function.