I was in the same circumstance. Emergency surgery to keep me ticking (aortic root, St Jude valve, dacron graft). I am/was dissected all the way down to illiac and renal.

After ascending repair I was on watch for aneurysm developing in defending aorta. There is a lot of pressure in your aortic root and ascending aorta. A little less once it gets past the arch. I made it 8 years and then had to get 2nd open heart surgery for descending side. They has to do what's called the elephant trunk procedure (replaced from first graft the entire arch and some way down with more dacron. Then went back in a week later to stent all the way up into the repair. Also stented illiac and renal dissections. Good times...

They will monitor and then when it weakens and forms an aneurysm they will have to go in again. Hopefully you will only need some stents instead of a full blown rebuild. Does it suck. Yup. But it is absolutely amazing what the surgeons can do nowadays. Best of luck and don't skip any of your follow up scans they are super important.