心尖舒张早期旋转角速度峰值评价高血压心肌肥厚患者舒张早期解旋运动

目的 利用超声二维斑点追踪显像技术探讨心尖舒张早期旋转角速度峰值在评价高血压病心肌肥厚患者舒张早期解旋运动中的价值.方法 原发性高血压病心肌肥厚患者20例,正常对照组20例.行常规二维超声检查后,存储左室心尖及心底短轴切面二维图像以备脱机分析.使用工作站Qlab软件中的TMQA分析程序,可以得到左室心尖及心底短轴切面各6个节段旋转角速度-时间曲线.利用计算机Excel软件将6个节段的数值平均处理后,得到左室心尖及心底角速度-时间曲线.比较两组心尖及心底舒张早期旋转角速度峰值(A-vel及B-vel).结果 高血压病心肌肥厚患者左室心尖舒张早期旋转角速度峰值(A-vel)明显低于正常对照组(P<0.05),而心底部舒张早期旋转角速度峰值(B-vel)两组差异无统计学意义(P>0.05).结论 心尖舒张早期旋转角速度峰值可以作为评价左室舒张功能的指标之一.

Clinical study of left ventricular untwisting motion by peak ventricular apical rotation velocity during early diastole

Objective To evaluate peak left ventricular(LV) apical rotation velocity during early diastole by speckle tracking echocardiography in normal peopleand patients with myocardial hypertrophy because of hypertension. Methods Two dimensional images of left basal and apical ventricular short axis view were recorded in 20 healthy people and 20 patients with hypertension and left ventricular hypertrophy(LVH). Rotation velocity-time curves of six segments in LV apex and base were obtained using Qlab software. The peak rotation velocity in early diastole of LV apex(A-Vel) and base (B-Vel) were acquired through Excel software. Results In LVH group,A-Vel was significantly decreased(P<0. 05) while B-Vel appeared no difference (P = 0.58) compared with healthy individuals. Conclusions Peak LV apical rotation velocity in early diastole can evaluate the change of LV diastolic function in patients with hypertension and LVH.