Dear Mariam,
Yes, Aysam's ALT level is high, I don't know what the long term complications of this would be. Right now the most important thing is to ensure that he gets proper chelation because that will release iron from his liver and improve its function. Most importantly, you need to protect his heart and if the iron levels remain high damage can occur in his heart. Our main goal is to get those levels down.
Aysam should be on IV desferal for a few weeks - and you should continue this until his iron levels are below 2000. If his liver enzymes are so high then perhaps you should be using desferal all of the time - it will be best for him at this time. Perhaps, once his iron levels are down and his liver enzymes return to normal you can start exjade again. This is my opinion, perhaps you can discuss it with out doctor. My prayers and best wishes are with you that all of this resolves and Aysam will be on a regular transfusion schedule soon.
I wish the little guy all the best,
Sharmin