CAJ | 학술논문

目的探讨超声二维斑点追踪显像技术测定三尖瓣环位移(tricuspid annular displacement, TAD)在评估右室收缩功能方面的应用价值.方法研究对象为扩张型心肌病患者18例,20例年龄相匹配的健康志愿者作对照组.取心尖四腔观采集二维和实时三维图像,然后将二维图像输入QLAB 6.2工作站获取三尖瓣环中点收缩期位移等参数,将实时三维图像输入TomTec工作站,用四维右室功能分析(4D RVF)软件计算右室射血分数(RVEF).结果 38例全部获得TAD值,30例得到RVEF数据.TAD各测值和RVEF之间相关性良好(P<0.01),扩张型心肌病患者TAD各测值均显著低于健康对照组(P<0.01).TAD在观察者间及观察者内的差异分别为(0.49±2.69)mm及(0.21±0.60)mm.结论二维斑点追踪显像检测TAD能客观反映右室的收缩情况,有望成为临床评价右室收缩功能的一项新指标.
목적 탐토초성이유반점추종현상기술측정삼첨판배위이(tricuspid annular displacement, TAD)재평고우실수축공능방면적응용개치.방법 연구대상위확장형심기병환자18례,20례년령상필배적건강지원자작대조조.취심첨사강관채집이유화실시삼유도상,연후장이유도상수입QLAB 6.2공작참획취삼첨판배중점수축기위이등삼수,장실시삼유도상수입TomTec공작참,용사유우실공능분석(4D RVF)연건계산우실사혈분수(RVEF).결과 38례전부획득TAD치,30례득도RVEF수거.TAD각측치화RVEF지간상관성량호(P<0.01),확장형심기병환자TAD각측치균현저저우건강대조조(P<0.01).TAD재관찰자간급관찰자내적차이분별위(0.49±2.69)mm급(0.21±0.60)mm.결론 이유반점추종현상검측TAD능객관반영우실적수축정황,유망성위림상평개우실수축공능적일항신지표.
Objective To determine the usefulness of tricuspid annular displacement(TAD),based on twodimensional speckle tracking imaging, for assessment of right ventricular(RV)systolic function.Methods Eighteen patientswith dilated cardiomyopathy and 20 age-matched healthy volunteers were in volved. Twodimensional and real-time three-dimensional(RT3D)imaging were obtained in all patients at apical four-chamber view.The parameters of TAD were derived from off-line QLAB software.RT3D-RV ejection fraction(RVEF)was calculated by using 4D RV function software.Results TAD data were acquired in all 38 cases, while RT3D-RVEF was done in 30 out of 38.The parameters of TAD correlated well with RVEF(P<0.01).The parameters of TAD in dilated cardiomyopathy group were significantly lower than the corresponding values in healthy subjects (P<0.01).The intra-and interobserver variabilities for measurement of TAD were(0.49±2.69)mm and(0.21± 0.60)mm, respectively.Conclusions TAD,based on two-dimensional speckle tracking imaging,proved to be a rapid and reproducible method in determining RV global systolic function.