摘要
目的应用斑点追踪超声心动图(STE)技术,研究正常成人左室旋转运动特征。方法选取我院健康体检者30例,取胸骨旁左室基底部及心尖部短轴扫查平面,对左室旋转进行测量分析,测量左室基底段和心尖段等容收缩期旋转角度、射血期旋转角度、等容舒张期旋转角度,计算等容舒张期解旋率,并将各项指标与年龄进行相关性分析。结果正常成人心脏的左室旋转运动主要表现为基底部顺时针旋转和心尖部逆时针旋转形成的相反运动,收缩末后立即发生快速解旋运动。左室射血期旋转角度与年龄呈正相关(P>0.05);等容收缩期旋转角度与年龄呈负相关,基底段有统计学意义(P<0.05),心尖段无统计学意义(P>0.05);等容舒张期解旋率与年龄呈负相关(P<0.05)。结论 STE技术可以无创评价正常成人左室旋转和解旋运动。
Objective To assess the characteristics of left ventricular （LV） rotation and untwist in normal subjects by speckle tracking echocardiography （STE）. Methods Thirty healthy adults were enrolled in this study. Then the parasternal basal and apical short - axis views were scanned and the angle of LV rotation during isovolumic contraction phase, ejection phase and isovolumic relaxation phase was measured by STE, LV untwisting rate during isovolumic relaxation phase was calculated. The correlation between the indexes and the ages was analyzed. Results LV performed contradictory motion with a counterclockwise rotation at the apex and a clockwise rotation at the base. After end systole, rapid untwisting was developed. LV rotations had positive correlation with age during ejection phase（P 〉0.05 ） , while negative correlation with age during isovolumic contraction phase. There was significant difference at basal level （ P 〈 0.05 ）, while no significant difference at apical level （ P 〉 0.05 ）. Untwisting rate had negative correlation with age during isovolumic relaxation phase （ P 〈 0.05 ）. Conclusion STE can evaluate LV rotation and untwist noninvasively.
出处
《临床超声医学杂志》
2011年第4期223-225,共3页
Journal of Clinical Ultrasound in Medicine
