I'm in the same situation. Recently diagnosed with 43 mm ascending aortic aneurysm. I had genetic testing and that was negative. In August I'll have another CT scan and echo. In the meantime I was told to add a beta blocker to my statin, which has further lowered my blood pressure and to keep doing cardio workout as long as I can carry on a conversation. The biggest change is weight training and lifting heavy objects. No more heavy weights or straining to lift or push objects. I've searched the Internet and found a cardiologist with an aortic aneurysm that recommends a different style of weight training called The 100. You can google it if you are interested. I'll have to wait until August to see if it is growing or staying the same.