Not exactly the same, dilatation of ascending aorta means the aorta diameter greater than 4 cm, there're mainly four possible causes, aortic aneurysm is one of them. AORTIC INSUFFICIENCY ETIOLOGY OF CARDIAC VALVE DISEASE means the valve isn't working properly that leads to aortic insufficiency. If you have both "ascending aorta dilatation" and "AORTIC INSUFFICIENCY ETIOLOGY OF CARDIAC VALVE DISEASE " on your report, that means you have heart valve disease, it leads to ascending aorta dilatation.