The portion of the left ventricular outflow tract delineated by the sinotubular ridge superiorly and the bases of the valve leaflets inferiorly; it comprises the aortic sinuses, the aortic valve leaflets, the commissures, and the interleaflet triangles. [ MP:0011572 ]
Synonyms: aortic root supraaortic valve area bulb of ascending aorta bulbus aortae root of aorta aorta bulb aortic bulb