@moonboy has covered pretty much the bootom line, there are exercies that punctually may raise your BP to dangerous high levels (dangerous for someone with an aneuryms or prone to having them), anything that makes you hold yor breath or grunt (lifting heavy weights, crunches for most people, etc) will raise your BP to significant levels for a very short period of time. On the other hand, keeping yourself in good shape will pay dividend when and if you ever need surgery, right now you are very far from the critical zone (as it approaches 5.0) and depending on growth rate you may never need surgery. I had my surgery 5 years ago at 5.2cm, I was in very good physica shape and my surgeon gave me >99% probability of no complications. Open Heart surgery is tough but for me it was as easy as it coud have been, recovery was very fast too.

I had very few limitations regarding cardio exercise, but my cardiologist was very emphatic regarding strength training.

Here is a video I have posted many times when this question has been asked, it is an interview with a cardiologist who is an aortic disease expert regarding the exercise subjet, hope it helps. All the best to you!!!