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| The diagnostic value of dual-source CT in adults bicuspid aortic valve malformation |
1.Department of Radiology, Wuwei People’s Hospital, Wuwei Gansu 733000, China;
2.Department of Radiology, Beijing Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 100037, China |
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Abstract Objective: To investigate the advantages and value of dual-source CT angiography in diagnosis of adults with congenital bicuspid aortic valve(BAV). Methods: Clinical and imaging data of 44 patients who were diagnosed as BAV and received surgical treatment were retrospectively analyzed, focusing on the imaging characteristics and type of BAV, the thickness of the aortic valve, the degree of valve calcification, ascending aorta diameter, transverse end-diastole diameter of left ventricular and so on. On the basis of surgical pathology results, according to the echocardiographic results, 44 cases of BAV patients were divided into two groups: 27 cases as truly diagnosed group, and 17 cases as falsely diagnosed group. We compared the results based on age, sex, type of the BAV, valve calcification degree, valve thickness, the extent of valve insufficiency. Results: CT made the definite diagnosis in all 44 cases of BAV patients, among whom 28 cases categorized as type 5, 7 as type 3, 5 as type 1, 4 as type 2, and 0 as type 4. Forty-two cases manifested with ascending aortic dilatation, 13 with left ventricular enlargement, 4 with high ostium of coronary artery, 1 with coronary-pulmonary artery fistula, 7 combined with coronary stenosis(≥50%); Proportion of moderate to severe valve calcification and valve thickness ≥3mm in falsely diagnosed group was significantly higher than that in truly diagnosed group(88% vs 48%, P=0.01; 88% vs 33%, P=0.0019), and the valve calcification and thickness were statistical different between the two groups(P<0.05). Conclusion: Dual-source CT plays an important role in BAV diagnosis, it can make accurate detection and diagnosis of BAV, and diagnostic accuracy for valve thickening of severe calcification is better than that of ultrasonic. At the same time to fully evaluate the valves of the heart structure and the aorta and coronary artery, CTA can be used as an important method to evaluate aortic valve malformation besides echocardiography.
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Received: 14 January 2016
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2016, Vol. 27 
