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二维超声心动图(2DE)定量检测13只犬在正常和急性心肌缺血时局部左室收缩功能(RLVF)。根据左室的几何图形,分析其几何参数,如半轴缩短值(△H)、节段性心内膜周长缩短值(△P)、节段性心内膜面积缩小值(△A)和节段性室壁面积增厚值(△AWTh)变化的百分率。结果显示,随着节段划分的增多,重复性反而降低,面积法的重复性优于长度法。但长度法的敏感性高于面积法(94％:82％),而面积法的特异性则高于长度法(100％:91％)。室壁运动异常的圆周范围高估心肌缺血的范围,室壁面积增厚的圆周范围与心肌缺血范围基本一致。结论:2DE定量检测RLVF面积法较好。
Two-dimensional echocardiography (2DE) quantitative detection of 13 dogs in normal and acute myocardial ischemia local LV systolic function (RLVF). According to left ventricular geometry, geometric parameters such as reduced axial length (△ H), segmental endocardial shortening (△ P), segmental endocardial area reduction (△ A) and segmental Percentage change in wall area thickening (Δ AWTh). The results showed that with the increase of segmental division, repeatability decreased, and the area method repeatability was better than the length method. However, the length method is more sensitive than the area method (94%: 82%), while the area method is more specific than the length method (100%: 91%). The circumferential extent of abnormal wall motion overestimates the extent of myocardial ischemia, and the circumferential extent of wall thickening is consistent with the extent of myocardial ischemia. Conclusion: 2DE quantitative detection of RLVF area method is better.