How likely is it to get re-coarctation after having a stent inserted?

100 %: "balloon dilation +/- stenting is an effective interim palliation for infants and newborns with critical coarctation and lv dysfunction. Restenosis is inevitable and requires to be addressed." source: ann pediatr cardiol. 2009 jul;2(2):111-5.

Low: There is no hard data (meaning no specific percentage). After the 1st surgery, there tends to be a 10-20% risk of recurrence. But after stent placement we know it's lower. So the answer is somewhere in the ball park of 5-10%, and recurrences can generally be treated in the cath lab. Please discuss your specific issues with your doctor.