Ask your doc about the aortic index. Both surgeons I talked to said that is how they base when to do the surgery. It all depends on how big the aneurysm is and how big of a person you are. My surgeons(two different opinions) said since I am small (my aneurysm is a 4.6) say I am a ticking time bomb. I will have surgery in the next month. One surgeon said he would have performed the surgery when it was at a 4.2 since I am such a little person. It’s a tough decision that’s for sure. I just turned 70 years young. 😀