Figure Legends
Figures 1A-1F : Axial computed-tomographic angiography images (A to C, cranial to caudal) shows the left brachiocephalic vein (L) crossing posterior to the aorta (A) and joining the right  brachiocephalic vein (R) to form the right-sided superior vena cava (RSVC). Volume rendered images (D, anterior view; E, anterior view with aorta digitally subtracted and F, posterior view with aorta digitally subtracted) demonstrates the retroaortic course of the left brachiocephalic vein.
Figures 2A, 2B : Transthoracic Echocardiogram images with color Doppler interrogation demonstrating the retro-aortic innominate vein. Panel A shows parasternal short axis view at the level of ascending aorta (AO). The brachiocephalic vein (IV) is seen coursing posterior to the ascending aorta and anterior to right pulmonary artery. Panel B shows the suprasternal view in which the brachiocephalic vein (IV) is seen coursing below the arch of aorta. The right pulmonary artery (RPA) is visualized coursing posterior and inferior to the retro-aortic brachiocephalic vein.
Figures 3A-3C : Four chamber image (A) and oblique sagittal image (B) shows presence of subaortic ventricular septal defect (*) with aortic (A) override in a patient of tetralogy of Fallot. Right ventricular (RV) hypertrophy is also noted. Oblique coronal image (C) shows presence of severe infundibular stenosis (arrowhead).
Figures 4A-4C : Volume rendered images (A to C) show presence of subaortic ventricular septal defect (*) with aortic (A) override. Right ventricular (RV) hypertrophy is noted with severe infundibular stenosis (arrowhead).
Figure 5A-5H : Diagram illustrating the normal and abnormal course of left brachiocephalic vein
A: Normal course of left brachiocephalic vein in front of the great arteries.
B: The anomalous left brachiocephalic vein crosses the midline above the aortic arch posterior to the origin of the great arteries.
C: The anomalous brachiocephalic vein passes beneath the aortic arch over the pulmonary artery bifurcation in front of the arterial duct.
D: The anomalous brachiocephalic vein passes posterior to the arterial duct, beneath the aortic arch and above the pulmonary artery.
E: The anomalous brachiocephalic vein crosses behind the main pulmonary trunk away from the arterial duct.
F: The anomalous brachiocephalic vein passes posterior to trachea and esophagus and joins the azygous vein.
G: The anomalous brachiocephalic vein divides into two branches. The anterior branch is located above aortic arch, behind the brachiocephalic trunk. The posterior branch crosses posterior to esophagus and joins the azygous vein before draining to right superior caval vein.
H: The circumaortic anomalous brachiocephalic vein divides into two branches. The anterior branch courses above aortic arch anterior to great arteries. The posterior branch courses below the aortic arch and posterior to descending thoracic aorta. Both branches joined the right superior caval vein separately.
Figure 6 : Diagrammatic representation of use of retroaortic left brachiocephalic vein in pulmonary artery reconstruction by creating a wide side-to-side anastomosis. The child had tricuspid atresia, pulmonary atresia with a left modified Blalock-Taussig shunt, a stented arterial duct and blocked central aortopulmonary shunt to the right pulmonary artery.
Abbreviations: ACV: Anterior cardinal vein, AO: Ascending aorta, APS: Aortopulmonary shunt, AV: Azygous vein, BCA: Brachiocephalic artery, CCV: Common cardinal vein, DTA: Descending thoracic aorta, ITCP: Inferior transverse capillary plexus, IV: Brachiocephalic vein, LBCV: Left brachiocephalic vein, LCCA: Left common carotid artery, LIJV: Left internal jugular vein, LOM: Ligament of Marshall, LPA: Left pulmonary artery, LSA: Left subclavian artery, LSV: Left subclavian vein, LV: Left ventricle, P: Pulmonary trunk, PA: Pulmonary artery, PAD: Patent arterial duct, PCV: Posterior cardinal vein, RA: Right atrium, RPA: Right pulmonary artery, RSVC: Right-sided superior vena cava, RVCV: Right brachiocephalic vein, STCP: Superior transverse capillary plexus, SV: Sinus venosus, SVC: Superior caval vein, VOM: Vein of Marshall,