No ASD visible, in keeping with closure. Right atrium and right ventricle are enlarged relative to the left atrium and to a lesser extent left ventricle.
Fusiform dilation of the right pulmonary artery measures up to 2.5cm in diameter.
Moderate size right upper pulmonary vein draining the right upper and middle lobes measuring up to 1.1cm inserts into the SVC.
Right lower lobe and left sided pulmonary veins drain into the left atrium.
IVC is large but without contrast reflux. Coronary sinus is not enlarged.
No evidence of coronary artery disease. Right dominant system with PDA and small right posterolateral branch.
Left main and LAD unremarkable. No diagonal branches identified.
Circumflex and large branching OM1 unremarkable. OM2/distal circumflex artery unremarkable.
Patchy mosaic attenuation in the left lung with the lucent areas associated with reduced vessel calibre. ?air trapping. This can be correlated with expiratory HRCT as clinically appropriate.
There is a gradual narrowing of the mid to distal trachea, narrowest diameter 7.5mm. The trachea also has a round cross section, with subtle suggestion of posterior ridging, in keeping with complete cartilaginous rings. In addition there is an incidental tracheal bronchus.
Scoliosis with degenerative change.
Conclusion
RUL and RML partial anomalous pulmonary venous return with a moderately large right upper pulmonary vein draining into the SVC. Dilated right heart in keeping with left to right shunt. Fusiform right pulmonary artery dilatation/aneurysm measuring 2.5cm may be related to pulmonary hypertension.