Abstract: To explore the clinical value of dual source CT in diagnosis of congenital heart diseases． Methods50 patients with suspected congenital heart disease underwent contrastenhanced dual source CT. Echocardiographgated technology was used in 40 patients, and common chest technology was used in 10 patients because of sinus tachycardia. All 50 patients underwent echocardiography, 27 of them were confirmed by surgical operations and 9 of them were confirmed by Xray angiography. Surgical or Xray angiography was used as a reference standard. Findings were compared with that of echocardiography in 36 patients. ResultsOf the 36 patients with congenital heart diseases, 1 arterial septal defect, 1 ventricular septal defect, 1 interruption of the aortic arch, 1 single ventricle, 1 complete transposition of the great artery, 1 abnormal origin of the pulmonary artery, 1 abnormal coronary sinus, 2 patent ductus arteriosus, 2 corrected transposition of the great arteries, 2 double outlet left ventricle, 2 abnormal origin of the right coronary artery, 2 pulmonary atresia with ventricular septal defect, 4 double outlet left ventricle, 5 coarctation of the aorta and 10 Tetralogy of Fallot. 107 deformities were confirmed by surgical or Xray angiography in 36 patients. The accuracy of dual source CT in detecting cardiac deformities was 95.33%. In 30 intracardiac deformities, definite diagnostic rates of dual source CT and echocardiography were 93.33% and 96.67%, and dual source CT was as accurate as echocardiography in revealing intracardiac deformities(P=1.000). In 77 extracardiac anomalies, definite diagnostic rates of dual source CT and echocardiography were 96.10% and 87.01%, and dual source CT was superior to echocardiography in identifying extracardiac anomalies(χ2=4.117, P=0.042). Combination of dual source CT and echocardiography increased the definite diagnostic rate to 99.21%. ConclusionDual source CT is superior to echocardiography in identifying extracardiac anomalies. Their combination can improve definite diagnostic rate for congenital heart disease.

Key words: Defect,congenital, Tomography,Xray computed, Angiography, Echocardiography