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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。
Objective To investigate the value of velocity vector imaging (VVI) in the diagnosis of myocardial ischemia in patients with coronary heart disease. Methods 30 cases of normal control group and coronary heart disease group were treated with VVI technique to detect the left ventricular wall, anterior wall, ventricular septum and inferior wall basal, middle segment, apex systolic peak velocity (Vs), diastolic Peak velocity (Ve), strain (ε) and strain rate (εR). The results were compared and analyzed. Results The Vs and Ve of the left ventricular wall in each group were decreased from basal to apex in the normal control group. There was no significant difference between the two groups (P> 0.05). The levels of Ve, ε and εR in ischemic segment of coronary heart disease were significantly lower than those in normal control group (P <0.01). The Vs of some segments were significantly lower (P <0.05). Conclusion VVI technique can quantitatively detect the movement of local myocardium and is helpful for the clinical diagnosis of myocardial ischemia.