quadricuspid aortic valve

There have been seven described variations of the quadricuspid aortic valve.

If an "X" shape is seen, then the patient can be diagnosed with having a quadricuspid aortic valve.

A quadricuspid aortic valve (QAV) is a rare congenital heart defect characterized by the presence of four cusps, instead of the usual three found normally in the aortic valve.

Quadricuspid aortic valves are very rare cardiac valvular anomalies with a prevalence of 0.013% to 0.043% of cardiac cases and a prevalence of 1 in 6000 patients that undertake aortic valve surgery.