CAJ | 학술논문

目的应用V-plane技术观察扩张型心肌病(DCM)患者左心室收缩不同步显像,并与临床常用的组织多普勒显像(TDI)技术进行对比,评价其相关性与一致性.方法对20例DCM患者及20例健康对照者进行超声检查,获取二维图像、V-plane双平面图像和TDI图像,测量左室12个节段TDI脉冲频谱达峰时间,并计算其标准差(TDI_SD),测量V-plane显像中12节段收缩位移达峰时间,并计算其标准差(V-plane_SD).结果与对照组相比,DCM组的TDI SD和V-plane_SD增大,TDI达峰时间延迟,V-plane达峰时间缩短,差异有统计学意义(P＜0.01);DCM组与对照组12节段中各节段V-plane收缩达峰时间均显著高于TDI收缩达峰时间,差异有统计学意义(P＜0.01);V-plane_SD与TDI_SD具有显著相关性(r=0.925,P＜0.001),Bland-Ahman分析显示TDI SD与V-plane_SD比值的95％数据点在一致性界限内,其比值的一致性界限为(0.50,1.36).结论在评价DCM患者左室收缩同步性时V-plane技术与TDI技术具有较高的相关性及一致性,V-plane能克服TDI不能在同一心动周期显示12节段的局限性.
목적 응용V-plane기술관찰확장형심기병(DCM)환자좌심실수축불동보현상,병여림상상용적조직다보륵현상(TDI)기술진행대비,평개기상관성여일치성.방법 대20례DCM환자급20례건강대조자진행초성검사,획취이유도상、V-plane쌍평면도상화TDI도상,측량좌실12개절단TDI맥충빈보체봉시간,병계산기표준차(TDI_SD),측량V-plane현상중12절단수축위이체봉시간,병계산기표준차(V-plane_SD).결과 여대조조상비,DCM조적TDI SD화V-plane_SD증대,TDI체봉시간연지,V-plane체봉시간축단,차이유통계학의의(P＜0.01);DCM조여대조조12절단중각절단V-plane수축체봉시간균현저고우TDI수축체봉시간,차이유통계학의의(P＜0.01);V-plane_SD여TDI_SD구유현저상관성(r=0.925,P＜0.001),Bland-Ahman분석현시TDI SD여V-plane_SD비치적95％수거점재일치성계한내,기비치적일치성계한위(0.50,1.36).결론 재평개DCM환자좌실수축동보성시V-plane기술여TDI기술구유교고적상관성급일치성,V-plane능극복TDI불능재동일심동주기현시12절단적국한성.
Objective To evaluate left ventricular systolic synchronicity in patients with dilated cardiomyopathy by V-plane imaging and compare with clinical commonly used tissue Doppler imaging (TDI),evaluate the relevance and consistency between these two parameters.Methods 20 patients diagnosed with DCM and 20 healthy controls were enrolled,2D images,V-plane imaging and TDI waveform were acquired.Time to peak velocity of left ventricular 12 segments were measured by TDI and the standard deviation (TDI_SD) were calculated.Displacement time to peak were measured by V-plane and the standard deviation (V-plane_SD) were calculated.Results Compared with control group,TDI_SD and V-plane_SD increased significantly (P ＜ 0.01),TDI time to peak increased and V-plane time to peak decreased significantly(P ＜0.01).In the two group,12 segment time to peak measured by V-plane were significantly higher than TDI(P ＜ 0.01).There was a significant correlation between TDI_SD and V-plane_SD (r =0.925,P ＜0.001).Bland-Altman plot showed that 95％ plots of ratio of TDI_SD and V-plane_SD were among limits of agreement,which was (0.50,1.36).Conclusions Left ventricular systolic synchronicity in DCM patients can be observed by V-plane imaging.V-plane has significant relevance and consistency with TDI,and can overcome the limitations of TDI that 12 segments can not be displayed in the same cardiac cycle.