Fig. 2

Variant anatomy of the aortic valve (AV); From a parasternal short axis, images (A) and (B) show a unicuspid AV in diastole and systole; Images (C) and (D) show a bicuspid AV with a left–right orientation and a raphe at approximately 3 o’clock in diastole and systole; Images (E) and (F) show a quadricuspid AV in diastole and systole