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Morphologic phenotypes in BAV. The configuration of a normal TAV is shown compared to three configurations of BAV Type 1 (one fibrous raphe). BAV R/L is the fusion between the R and L coronary cusps and is the most common, accounting for 80% of Type 1. BAV R/NC is the fusion between the R and NC cusps (occurring in 17% of Type 1 cases), and BAV L/NC is the fusion the between L and NC cusps (~1%). BAV, bicuspid aortic valve; R, right; L, left; NC, non-coronary.
