A, 2D balanced steady-state free precession cine MRI showing the left
ventricular outflow tract and the position of the aortic valve imaging plane
shown in yellow. B, TAV and the 2 most common BAV phenotypes:
R/L and R/N cusp fusion. Arrows show the location of the raphe
(if present) between the conjoined cusps. The conjoined R/L cusp (yellow
box, arrow) is also seen to be doming in the corresponding left
ventricular outflow tract view (A, arrow). Bicuspidality of the
aortic valve should be assessed in systole rather than diastole, because the
valves often appear tricuspid when closed. TAV, Tricuspid
aortic valve; RL, right-left; RN, right
noncoronary. Adapted from Entezari and colleagues.182