用组织多普勒技术评价扩张型心肌病室壁运动

目的　用组织多普勒技术分析扩张型心肌病 (DCM)室壁运动。方法　选择 DCM患者和正常对照各 30例 ,用组织多普勒技术于胸骨旁长轴检测室间隔及左室后壁中间段短轴方向心肌运动速度 (MV) ,并计算心肌运动速度阶差 (MVG) ;经心尖窗检测左室前、后、下、侧壁和前、后室间隔中间段长轴方向 MV。结果　 DCM组患者有 4种 MV频谱异常表现 ,且 MV明显低于对照组 (P<0 .0 5 ) ,并以长轴为甚 ;MVG明显减低 (P<0 .0 5 ) ;室壁各种速度差异消失。结论　组织多普勒技术可定量反映 DCM患者室壁运动异常

Evaluating Wall Motion of Dilated Cardiomyopathy by Pulsed-Wave Doppler Tissue Imaging

Objective To evaluate the characteristics of wall motion in cases of dilated cardiomyopathy(DCM) by the use of Doppler tissue imaging (DTI). Methods We observed 30 DCM patients and 30 normal volunteers. For the assessment of short axis motion, the myocardial velocities (MV) and transmural myocardial velocity gradients (MVG) of the middle segments of anterior interventricular septum and left ventricular posterior wall were recorded through parasternal long axis view. We detected the MV of the middle segments of left ventricular walls to evaluate the long axis motion through apical windows(4 chamber, 2 chamber and long axis). Results Four kinds of abnormal presentations of the waves were seen in DCM cases. The patients' MV of were obviously lower as compared with the controls', especially in long axis; the patients' MVG also decreased significantly ( P <0.05). In the patient group, the heterogeneity of wall motion disappeared too. Conclusion PW DTI can quantitatively assess the above abnormalities of DCM and provide supplementary information for clinical use.