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《Radiologic Practice》 2005-09
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Correlation of Duplex Sonography and Digital Subtraction Angiography in the Diagnosis of Carotid Artery Stenosis

LIU jia-li,JIANG Shi-liang,ZHENG Hong,et al.Department of Radiology,Fuwai Hospital,Cardiovascular Institute of Peking Xiehe Medical College,Chinese Academy of Medical Science,Beijing 100037,P.R.China  
Objective:To assess the clinical value of Duplex sonography in the diagnosis of carotid artery stenosis.Methods:Duplex sonography and digital subtraction angiography (DSA) were performed in 41 patients with clinical suspected carotid stenosis.Stenosis measurement according to NASCET criteria for DSA was used and correlated with the findings of Duplex sonography.Sensitivity,specificity,positive predictive value (PPV),negative predictive value (NPV),were calculated.Results:Of the 82 carotid arteries assessed on DSA,there were normal vessel (n=53),mild to moderate stenosis (≤69%,n=11),severe stenosis (≥70%,n=10),occlusion (100%,n=8).Taking abnormal (including occlusion and stenosis) as a cutoff point,the sensitivity,specificity,PPV,NPV was 94.2%,90%,94.2%,90%,respectively.Taking severe stenosis (≥70% ) as a cutoff point,the sensitivity,specificity,PPV,NPV was 86.4%,72.7%,89%,66% respectively. Conclusion: Duplex sonography is an effective technique and could be used as a screening test for the diagnosis and follow-up examination of the carotid artery stenosis.For patient with severe stenosis (≥70%),which is considered as candidate for endarterectomy and percutaneous transluminal carotid angioplasty,DSA should be performed.
【CateGory Index】: R445
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