Exercise Guidance with Ascending aorta dilation

I am a 56 yo male recently diagnosed with a 4.7 cm ascending aorta dilation. Exercise and weight training has been a part of my life since I was 14 and I was told the following: no competitive sports, no contact sports, exercise more cardio versus "heavy lifting". I was told not to lift more than 50 pounds - super light for me, I have read other things like < 100 #, or half your body weight which is half my body weight. My doctor said swimming, light hiking, biking but no dead lifts which I do not do. I asked about HR parameters which my doctor said 150 or below is ok. I don't lift "heavy weights" anymore, but I did do pushups, planks and BW rows on TRX which I read was not great due to the isometric exercise that increases BP. I am a good shape so this 50#.no isometric restriction is an issue. I am not sure what I can in terms of resistance and what cardio intensity is acceptable? Physical activity has been a part of my life - I am looking for guidance as these restrictions are confusing to me. Any help would be great. Thanks! JZ