三维超声心动图的临床应用

Clinical Application of Three-Dimensional Echocardiograpy Patients with Old Myocardial Infarction

研究三维超声心动图(3DE)对心血管疾病的诊断价值。离体心脏实验及核素(^(99m)TC)测定显示:与二维超声心动图(2DE)卡H比,3DE对左窄容量的测定与实测值更接近。P>0.05并与核素造影有着良好的相关性。r=0.88,尤其通用于左室形状起变化的病理心脏。此外,应用3DE开展了(1)左室容量动态变化的定量分析,观察心肌瞬间的收缩及舒张功能。本文发现陈旧性心梗(OMI)患者的左心收缩功能损害主要在收缩早期,前壁心梗在收缩中期亦受明显影响。舒张期的损害主婴在舒张早期,在舒张中期,有部份时相受影响。(2)左室心肌节段收缩率的定量分析。结果显示:陈旧性心梗的低收缩率心肌面积明显大于正常人组。同时提出了正常人的(3DE)各项心功能参数参考伉。

The accuracy of 3-DE in evaluating the left ventricular (LV) volume in comparison with that determined by ^(99m)Te was studied in patients with old myocardial infarction (MI). Results obtained were very close one another (P>0.05, r=0.88). Quantitative detrminations of the dynamic changes in the LV volume were also carried out by using the 3-DE. It was found that in patients with old MI the functional changes in the myocardial contraction occurred mainly at the early phase of systole, and in the case of anterior wall MI the changes extended to the mid-systole. Segmental contractility of LV was also analyzed quantitatively. It was found that the myocardial area of low contractility in old MI was significantly more marked than that in normal subjects. Refetence values of various parameters in cardiac function evaluated by 3-DE were offered.