Introduction
Total anomalous pulmonary venous connection (TAPVC) constitutes 1%–1.5% of congenital heart diseases in children. Four types have been identified based on where the pulmonary vein connects abnormally: supracardiac, cardiac, infracardiac, and mixed, where the anomalous connection occurs at 2 or more of the above levels. [1] [2]
In the 2 cases discussed in this report, a second vertical vein was noticed incidentally during routine follow-up catheterization 1 year after the initial surgery.
It originated proximally from the ligated vertical vein and drained into the superior vena cava through the accessory hemiazygos vein.
It seemed that blood perfusion to a second vertical vein had increased due to disappear of dominant vertical vein blood perfusion after the initial surgery.
In this report we discuss the management of this rare case. Furthermore, this is the first reported case of a transcatheter closure of a second vertical vein in a mixed TAPVC.