Hey hunni, right, I know a little bit about newborns and heart problems.
A hole in the heart is also known as a VSD (Ventricular Septal Defect).
You can get a variety of these, which can range from a small hole in the heart which approximately 80-90% of cases close naturally following the birth of a child (can take up to 2 years), with no medical intervention needed.
You then have the other scenario, where the baby may need to be treated with medication and this will then slowly close the hole in the heart.
Finally, you have the real biatch, which is where the VSD will not close by itself as it is too large and the baby will need surgery, most likely open heart surgery, to correct this.
Aimee has a form of a hole in her heart, although it was in a very dangerous and complicated area (her pulmonary artery and aortic artery had fused together). They basically get a patch made from a cow (I think) and patch it up.
VSD's in normal areas are quite easy to treat and the sucess rate is very high for children born with this sort of problem.
Im not sure if this helps, or just confuses you even more, but feel free to ask if there is anything else I can help with.
On a final note, if they do have to pay for things to be done privately, then they are likely to run in the tens of thousands of pounds.
x