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冠脉造影２４ｈ内记录５０例疑冠心病患者和１５例对照者的二维超声心动图，借助超声心动图图像分析系统计算室节段面积变化率（△Ａ％）。结果表明：①△Ａ％定性、定位、定支诊断冠心病的敏感性分别为１００％、８４．８５％及８７．８８％，特异性均为８０．７７％。②与左室射血分数和左室整体舒张功能比较，发现冠心病患者△Ａ％改变最敏感（１００％），左室整体舒张功能次之（６５．６２％），左室射血分数最差（４３．２１％）．③侧支循环的存在、冠脉左旋支和右冠脉供血的重叠及冠脉狭窄程度较轻是△Ａ％定位和定支诊断失误的主要原因。对各部位△Ａ％存在差别的可能原因，进行了分析。
Two-dimensional echocardiography was recorded in 50 patients with suspected coronary artery disease and 15 controls within 24 hours of coronary angiography, and the rate of change in the area of the segmental segments (ΔA%) was calculated by echocardiography analysis system. The results showed that: ① The sensitivity, specificity and accuracy of △ A% were 100%, 84.85% and 87.88%, respectively, and the specificity was 80.77%. ② Compared with left ventricular ejection fraction and left ventricular diastolic function, it was found that △ A% was the most sensitive (100%) in coronary heart disease, followed by left ventricular diastolic function (65.62%), left ventricular ejection fraction Poor (43.21%). ③ The existence of collateral circulation, coronary artery left coronary artery and right coronary artery blood supply overlap and coronary artery stenosis is light △ A% positioning and fixed diagnosis of the main reason for the error. The possible reasons for the difference in △ A% of each site were analyzed.