速度向量成像技术对扩张型心肌病心脏扭转运动的研究

目的 应用速度向量成像技术定量分析扩张型心肌病(DCM)患者左心室扭转运动,探讨该技术在心脏扭转运动研究中的应用价值.方法 应用速度向量成像技术测量27例DCM患者与60例正常对照者左室内径及心功能,并于心底部与心尖部短轴观分别获取两个切面心内膜与心外膜旋转角度、旋转速度曲线.结果 DCM组心功能明显低于对照组(P＜0.01),心底部与心尖部旋转角度和旋转速度、心内膜与心外膜旋转角度和旋转速度DCM组均明显低于对照组(P＜0.01).结论 速度向量成像可快速、无创、定量评价DCM患者左室扭转运动,为了解DCM心脏运动特征提供了新的方法 .

Study on cardiac torsional deformation in patients with dilated cardiomyopathy by velocity vector imaging

Objective To characterize the systolic torsion in dilated cardiomyopathy (DCM) by velocity vector imaging(VVI).Methods Eighty-seven subjects were studied using VVI:27 patients with DCM and 60 healthy control subjects.Left ventricular short-axis acoustic images were acquired at base and apex levels.The rotation angle and rotation velocity of endocardium and epicardium were measured.Results LVEF of DCM group was significantly lower than that of control group ( P＜0.01).The basal and apical rotation angle, rotation velocity were significantly lower in DCM group.The endocardial and epicardial rotation angle, rotation velocity were also significantly lower in DCM group than those in control group (P＜0.01).Conclusions VVI is a rapid and noninvasive tool to quantitatively assess cardiac torsional deformation in DCM patients,which providing another useful modality for evaluating cardiac function.