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将34例临床诊断冠心病患者之~(201)铊心肌显象与冠状动脉造影结果作对比。~(201)铊显象之敏感性为81.8%,特异性58.3%。6例冠状动脉旁路手术前后作~(201)铊显象,5例术后改善,1例造影阴性~(201)铊阳性者在心肌活检后诊断为心肌炎。~(201)铊显象敏感性与冠状动脉病变之部位、程度、支数有关。左回旋支病变阳性率低,狭窄严重者阳性率高,受累支数多者阳性率反低,4例造影异常而~(201)铊正常者均系3支病变。1例3支病变者旁路术前~(201)铊阴性,术后反呈阳性,提示缺损还为局部心肌供血比例不平衡之结果。
We compared ~ (201) thallium myocardial imaging with coronary angiography in 34 clinically diagnosed CHD patients. The sensitivity of ~ (201) thallium imaging was 81.8% and the specificity was 58.3%. Six patients underwent preoperative and postoperative coronary artery bypass grafting with ~ (201) thallium, five postoperatively improved, and one negative for ~ (201) thallium positive diagnosed with myocarditis after myocardial biopsy. ~ (201) The sensitivity of thallium imaging is related to the location, degree and number of coronary lesions. The positive rate of left circumflex artery lesion was low, and the stenosis was severe. The positive rate was high in patients with severe stenosis, and the positive rate was lower in patients with more severe ones. There were 3 lesions in 4 patients with normal thallium and 201 normal thallium. One patient with 3 lesions had negative ~ (201) thallium preoperatively, positve positive after operation, suggesting that the defect was also the result of unbalanced local myocardial blood supply.