strange circumstances

In my mid 20's I had endocarditis. It pretty much did a number on my bicuspid aortic valve and caused 2 aneurysms in the sinus of valsalva. The valve was replaced with a homograft valve and the two aneurysms were repaired.Ten years later and two children later the valve was replaced with a St.Jude. Prior to second surgery my aorta was mildly dilated at 3.8. This was 5 years ago. At the present time my ascending aorta is 4.7 with a dilated aortic root which is causing a small leak in that valve. My doc is always checking the aortic root but recently hasn't checked the aorta itself. Is the aortic root more of a concern than the aorta, or should the aorta be checked also? My EF is at 62% with a dilated left atrium. Why a dilated left atrium?