[Table/Fig-20]:

Infracardiac tapvc.

Infracardiac Tapvc	Pathway of pulmonary venous return: Common pulmonary venous channel drains into portal vein, ductus venosus, hepatic vein or IVC by crossing the diaphragm through esophageal hiatus
Incidence [13]	Accounts for 20% of TAPVC patients. Marked male preponderance with M:F ratio of 4:1. Most of infracardiac TAPVC are obstructed. Hence it is considered as one of the paediatric cardiac emergency.
Association	ASD/PFO
Syndromes
Imaging features Plain	Normal or mild cardiomegaly	Pulmonary oedema features (diffuse reticular pattern and Kerley B lines)
Imaging features specific	Echo - dilated descending vein passing through diaphragm and draining into systemic veins. MRI best suited for post-op follow-up CT useful in features of obstruction on ECHO with unclear site of obstruction
Management [13]	Surgical: Large vertical anastomosis between common pulmonary venous channel and LA with ligation of common channel above the diaphragm