What does an echo aortic root measure from? my report says "sinus of valsalva" is 4.1 but ascending aorta is normal. i'm 6 foot 2, 300 pounds. it's classified as moderately dilated? wouldn't i have a larger root because of my body size?

An aortic sinus, also known as a sinus of Valsalva, is one of the anatomic dilations of the ascending aorta, which occurs just above the aortic valve. A aortic size of 4.1 cm at this area is still within normal limit (29-45 mm) so you have nothing to worry. Please see here - https://www.researchgate.net/figure/Aorta-and-its-normal-size-range_fig3_325922743 - Take care.