Introduction:
CPB circuits are frequently necessary in the repair of congenital heart
defects in neonates and children.Single stage cannulae are used during
most open-heart surgeries, where two Cannulae are inserted in SVCand IVC
and connected by Y-piece to establish CPB to divert the deoxygenated
venous blood to the heart-lung machine for oxygenation and then back via
the arterial cannula intothe ascending aorta. Displacement of the venous
cannulae can obstruct venous blood flow andmay result with SVC and IVC
syndrome. [1]Conversely, the aortic cannulation can cause
complications like aortic dissection, aortic rupture, profuse
bleeding,and dislodgement of aortic atheroma resulting in systemic
embolization.[2]we report a rarer consequence of aortic cannulation
asa severe aortic blood flow obstructionresulting in repeated cardiac
arrests in a child after successful VSDrepair under CPB.
Key words : congenital heart disease, CPB, aortic cannulation,
aortic obstruction, cardiac arrest, TEE