| 刘夏天,吕清,谢明星,王新房,王静,龚静吉,方凌云,杨亚利,贺林.心肌速度分布图评价左室局部收缩功能的初步研究[J].中国医学影像技术,2006,22(5):701~704 |
| 心肌速度分布图评价左室局部收缩功能的初步研究 |
| Evaluation of regional left ventricular systolic function by myocardial velocity profile |
| 投稿时间：2005-12-03 修订日期：2006-02-14 |
| DOI： |
| 中文关键词: 多普勒组织成像 心肌速度分布图 心肌速度梯度 心室功能 |
| 英文关键词:Tissue Doppler imaging Myocardial velocity profile Myocardial velocity gradient Ventricular function |
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| 中文摘要: |
| 目的 应用组织多普勒心肌速度分布图(myocardial velocity profile, MVP)对左室短轴方向局部收缩功能进行评价。方法 应用MVP对15例健康志愿者、15例高血压性左室肥厚患者和11例室间隔非对称性肥厚型心肌病患者的室间隔和左室后壁短轴方向的收缩功能进行评价。结果 高血压组的室间隔和左室后壁收缩期心肌速度梯度(myocardial velocity gradient, MVG)显著低于对照组,具有统计学差异 。肥厚型心肌病组的室间隔和左室后壁收缩期MVG显著低于对照组,具有统计学差异 。MVG的降低以肥厚型心肌病组的室间隔最为显著,肥厚型心肌病组的室间隔收缩期MVG低于高血压组,具有统计学差异 。高血压组、肥厚型心肌病组和对照组室间隔的MVP均呈近似线性,但肥厚型心肌病组心肌各点速度分布较对照组和高血压组明显分散。结论 高血压性左室肥厚患者和肥厚型心肌病患者左室短轴方向局部收缩功能较正常人减低,MVP能精确地反映心肌短轴上各点在心动周期中的运动速度,并可计算出MVG,可作为一种准确评价左室心肌短轴方向局部收缩功能的新方法。 |
| 英文摘要: |
| Objective This study was designed to evaluate the regional left ventricular systolic function in short-axis orientation by myocardial velocity profile (MVP). Methods Transmural wall-motion velocities of ventricular septum (VS) and left ventricular posterior wall (LVPW) were recorded in 15 healthy volunteers, 15 patients with hypertensive hypertrophied left ventricles and 11 patients with asymmetric septal hypertrophy. Their MVPs and myocardial velocity gradients (MVG) were determined to evaluate the regional left ventricular systolic function in short-axis orientation. Results The systolic MVGs in VS and LVPW were both significantly lower in hypertrophic cardiomyopathy group and hypertension group than in control group ( vs vs , P<0.0001 and vs vs , P<0.001). The systolic MVGs in VS of hypertrophic cardiomyopathy group were significantly lower compared with hypertension group ( vs , P<0.01). In all the groups, the MVPs in VS and LVPW were closely linear, but the distribution of velocities in VS was fairly dispersed in hypertrophic cardiomyopathy group compared with control group and hypertension group. Conclusion The regional left ventricular systolic function in short-axis orientation was decreased in patients with asymmetric septal hypertrophy and patients with hypertensive left ventricle hypertrophy. The MVPs and MVGs obtained from two-dimensional tissue Doppler imaging may represent new indices for evaluating regional left ventricular contractile abnormalities. |
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