速度向量成像技术在诊断冠心病心肌缺血中的应用价值

目的 探讨速度向量成像（VVI）技术在诊断冠心病心肌缺血中的应用价值.方法 正常对照组与冠心病组各30例,应用VVI技术检测两组左室侧壁、前壁、室间隔及下壁基底、中间段、心尖节段的收缩期峰值速度（Vs）、舒张期峰值速度（Ve）、应变（ε）及应变率（εR）,结果进行对比分析.结果 正常对照组左室壁各节段心肌运动的Vs和Ve均由基底部向心尖部递减;左心室各节段心肌的ε和εR之间比较差异无统计学意义（P 〉 0.05）.冠心病缺血节段Ve、ε及εR均较正常对照组显著降低,差异有统计学意义（P 〈 0.01）,部分节段Vs显著降低,差异有统计学意义（P 〈 0.05）.结论 VVI技术能定量检测局部心肌的运动情况,有助于临床诊断心肌缺血.

Application value of velocity vector imaging in diagnosis of myocardial ischemia in coronary heart disease

Objective To investigate the application value of velocity vector imaging （VVI） in diagnosis of myocardial ischemia in coronary heart disease. Methods All subjects were divided into normal control group of 30 cases and coronary heart disease group with 30 patients, the peak systolic velocity （Vs）, diastolic peak velocity （Ve）, strain （ε） and strain rate （εR） of basal, middle and apical segment of anterior, septal, latarel and inferior wall were detected by VVI. Results Vs, Ve decreased in orderly from base to the apex, there was no significant difference of ε and εR among different segments of left ventricle（P 〉 0.05 ）. Ve, ε, εR of all segments of ischemic segments in coronary heart disease group were significantly lower than those of the normal control group （P 〈 0.01 ）, part of the segment Vs was significantly decreased, there was significant difference （P 〈 0.05）. Conclusion VVI technology can quantitatively detect the movement of regional myocardium, it can contribute to the clinical diagnosis of myocardial ischemia.