Study limitations
There are several limitations in our study. The retrospective study represents the major limitation of our study. The number of patients in BAV group was limited, but the prevalence of BAV versus TAV patients is similar to previous studies. Aortic dimensions were measured and analyzed by echocardiography, either at baseline or at follow up. Another limitation is that we used a proximal aortic diameter of 45mm as our uniform cutoff value.