超声二维斑点追踪技术对肥厚型心肌病左室旋转及扭转运动的研究

目的 应用超声二维斑点追踪技术评价肥厚型心肌病（HCM）患者左室短轴心肌旋转及扭转运动特征.方法 HCM组35例,正常对照组30名,获取左室短轴二尖瓣环水平,心尖水平二维图像.测定左室短轴二尖瓣水平、心尖水平各节段心肌收缩期旋转角度峰值,计算左室短轴心肌收缩期扭转角度峰值？结果（1）HCM组左室短轴二尖瓣水平及心尖水平各节段心肌收缩期旋转角度峰值较正常组增大（P＜0.05）.（2）HCM组左室短轴心肌收缩期扭转角度峰值较正常组增大（P＜0.05）.结论 HCM组左室旋转及扭转运动均较止常组增高.

Study on Left Ventricular Rotation and Torsion in Patients with Hypertrophic Cardiomyopathy by Two-dimensional Ultrasound Speckle-tracking Imaging

Objective To assess the left ventricular rotation and torsion in patients with hypertrophic cardiomyopathy（HCM） by 2-dimensional ultrasound speckle-tracking imaging（STl）. Methods Two-dimensional images of left ventricule at basal and apical short-axis views were acquired in 35 patients with HCM and 30 healthy subjects to evaluate LV rotation.LV torsion was defined as the maxium difference between basel and apical rotation.Results Compared with the healthy group,all the segments of left ventricule at basal and apical short-axis views significantly increased（all P〈0.05）and the torsion of left ventricule at short-axis view significantly increased in the HCM group（P〈0.05）. Conclusion Compared to the healthy group,LV rotation and torsion in patients with HCM are increased.