Table 1 Significant associated cardiac anomalies.

Abnormality	No
Significant mitral valve abnormality	6 (3%)
Shone's complex	4 (2%)
TGA (± VSD)	17 (9%)
TGA + dextrocardia	2 (1%)
Single ventricle (DORV, DILV, etc)	8 (4%)
Atrioventricular septal defect	2 (1%)
Anomalous pulmonary vein drainage	1 (0.5%)
Atrial isomerism + VSD	1 (0.5%)
Severe subaortic stenosis	2 (1%)
Cor triatriatum	1 (0.5%)
Sinus venosus atrial septal defect	1 (0.5%)
Ebstein's anomaly	1 (0.5%)
Congenitally corrected TGA	1 (0.5%)
Aortopulmonary window	1 (0.5%)
Dextrocardia	1 (0.5%)
Complex intracardiac anomalies (total)	49 (26%)

DILV, double inlet left ventricle; DORV, double outlet right ventricle; TGA, transposition of the great arteries; VSD, ventricular septal defect.