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目的:评价64排螺旋CT血管造影(CTA)对冠心病患者旁路移植(CABG)术后冠状动脉桥血管病变的诊断价值。方法:以选择性冠状动脉造影(SCA)为金标准,采用64排螺旋CT对46例冠心病CABG术后患者可评估的114条桥血管进行分析,评价其诊断冠状动脉桥血管病变的敏感性和特异性。结果:CTA能够清晰判断CABG术后患者桥血管通畅、显著狭窄或闭塞,并能清楚显示桥血管吻合口的情况。CTA正确诊断22处病变,漏诊1处,误诊3节段;敏感性96%,特异性97%,阳性预测率88%,阴性预测率99%;准确率96%。结论:CTA显示冠状动脉桥血管图像清晰,具有诊断价值,可作为评价冠状动脉桥血管病变的一种重要无创手段。
Objective: To evaluate the diagnostic value of 64-slice spiral CT angiography (CTA) in the diagnosis of coronary artery bypass graft (CABG) after coronary artery bypass graft. Methods: Selective coronary angiography (SCA) was taken as the gold standard. Forty-six spiral CT scans of 46 patients with CABG postoperative coronary artery disease were analyzed by 64-slice spiral CT. The sensitivity of the diagnosis of coronary artery bypass graft disease was evaluated And specificity. Results: CTA could clearly determine the patency of the bridge vessels in patients with CABG, significant stenosis or occlusion, and clearly demonstrated the situation of anastomosis of the bridge vessels. CTA correct diagnosis of 22 lesions, missed a diagnosis, misdiagnosis 3 segments; sensitivity 96%, specificity 97%, positive predictive rate of 88%, negative predictive rate of 99%; accuracy of 96%. Conclusion: CTA shows that the coronary artery vessel images are clear and of diagnostic value, which can be used as an important noninvasive means to evaluate coronary artery bridge vascular disease.