Evaluation of morphologic characteristics and changes of motion of the aortic valve with dual-source CT coronary angiography
10.3969/j.issn.1002-1671.2014.11.012
- VernacularTitle:双源 CT 冠状动脉成像评估主动脉瓣形态结构及运动情况
- Author:
Pufei WANG
;
Gang WANG
;
Zhi LI
;
Bo SHE
;
Hongfei AN
;
Haiyan WU
- Publication Type:Journal Article
- Keywords:
aortic value;
computed tomography;
echocardiography
- From:
Journal of Practical Radiology
2014;(11):1822-1826
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the feasibility and accuracy of dual-source computed tomography(DSCT)coronary angiography for evaluation the morphology and motion of aortic valve.Methods A total of 125 cases with suspected coronary artery disease un-derwent computed tomography coronary angiography and transthoracic echocardiography examination.Twenty CT data sets were re-constructed in 5% steps from 0% to 95% of R-R interval.The morphologic features,changes of motion and image quality of the aortic valve in cardiac cycle were observed and recorded with CT dynamic cine-mode technique.The differences of aortic opening area in the various phases of the systole were analyzed by using ANOVA.Results 92.3% of aortic valve images among the total 2500 phases were good enough for evaluated in the 125 patients examined.DSCT visualized 123 patients with tricuspid aortic valve while 2 patients with bicuspid aortic valve.27 patients with degenerative aortic valve disease were identified.CT correctly identified 26 patients with aor-tic insufficiency during diastole.Compared with TTE,3 patients were false positives and two patients were false negatives on DSCT. Aortic valve opening was seen in phase 0% to 35% in 92% of patients,and it was closed during phase 40% to 95% of R-R interval in 75.2% of patients.There were significant difference between the AVA in the various phases of the systole(F =2.97,P <0.05). Conclusion DSCT allows accurate and dynamic visualization of morphology and motion of aortic valve throughout the cardiac cycle. The area of the aortic opening is widest and image quality is best during midsystole.
