I'm a lifelong exerciser (not a competitive athlete), age 75,and also was diagnosed with an enlarged ascending aorta (4.9) on a recent cardiac ultrasound. In addition, it showed an enlarged left atrium, but no other abnormalities. I've got a couple of other heart studies in the works, a 14-day heart monitor patch to check for electrical system abnormalities and an angiogram to check for coronary artery blockages.