Abstract Background Quadricuspid aortic valve (QAV) is a rare congenital anomaly characterized by the presence of four cusps instead of the usual three. It is estimated to occur in less than 0. 05% of the population. with Type A (four equal-sized leaflets) accounting for roughly 30% of QAV subtypes. https://www.lecoureures.shop/product-category/ski-de-fond-enfant-skis-skate/