Quadricuspid Aortic Valve Diagnosed by Doppler Echocardiography: Report of Two Cases and Review of the Literature

Quadricuspid aortic valve is a rare congenital anomaly which is usually diagnosed at surgery or, most often, at autopsy. Echocardiography alone is shown to be helpful in diagnosis and follow-up. We report two cases detected non-invasively by Doppler echocardiography.