Clinical application of 64-slice spiral CT in the diagnosis of the Tetralogy of Fallot.
OBJECTIVE
To explore the clinical application of 64-slice spiral CT in the diagnosis of the Tetralogy of Fallot.


METHODS
Eighteen patients with diagnosed Tetralogy of Fallot underwent cardiac CT angiography with 64-slice CT (CTA). Two- and three-dimensional images were used for diagnosing in all cases by means of MPR (coronal, sagital and oblique), cMPR, MIP and VRT.


RESULTS
All patients had ventricular septal defect, pulmonary stenosis and hypertrophy of right ventricle. The morphologic features of Tetralogy of Fallot were equal to echocardiography. Patent ductus arteriosus (PDA) were detected on eight patients. Main coronary artery branches and partial sub-branches were visualized in all patients. Abnormal coronary arteries were found in seven cases: both left and right main coronary artery arising from the right aortic sinus one case, right main coronary artery and circumflex (CX) arising from the right aortic sinus one case, left anterior descending (LAD) and CX arising from left aortic sinus directly one case, left and right coronary artery arising from back and front of the aortic sinus, respectively, three cases. Pulmonary artery branch stenosis was found in 12 cases and branch pulmonary artery dilation noticed in 1 case. Double superior vena cava was also found in one case. According to the surgery the diagnostic accuracy of CT and Echocardiography was 95.45 and 83.33%, respectively.


CONCLUSIONS
Two- and three-dimensional 64-slice CTA not only show the overall anatomical structure of the heart, but also show coronary and pulmonary arteries. With these results, evaluation of coronary anomalies and pulmonary artery stenosis with 64-MSCT is extremely valuable for planning the operative procedure on the patients with Tetralogy of Fallot.
Wang
Xi-Ming
XM
Tianjin Medical University, Tianjin City, PR China. wxming369@163.com.cn
Wu
Le-Bin
LB
Sun
Cong
C
Liu
Cheng
C
Chao
Bao-Ting
BT
Han
Bo
B
Zhang
Yun-Ting
YT
Chen
Hai-Song
HS
Li
Zhen-Jia
ZJ
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D017023:Coronary Angiography / Q000379:methods; D003330:Coronary Vessel Anomalies / Q000000981:diagnostic imaging; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging; D004374:Ductus Arteriosus, Patent / Q000000981:diagnostic imaging; D004452:Echocardiography; D005260:Female; D006345:Heart Septal Defects, Ventricular / Q000000981:diagnostic imaging; D006801:Humans; D017380:Hypertrophy, Right Ventricular / Q000000981:diagnostic imaging; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D011651:Pulmonary Artery / Q000000981:diagnostic imaging; D011666:Pulmonary Valve Stenosis / Q000000981:diagnostic imaging; D012850:Sinus of Valsalva / Q000002:abnormalities / Q000000981:diagnostic imaging; D013771:Tetralogy of Fallot / Q000000981:diagnostic imaging*; D036542:Tomography, Spiral Computed / Q000379:methods*; D014683:Vena Cava, Superior / Q000002:abnormalities