Quadricuspid Aortic Valve Diagnosed by Transesophageal Echocardiography: A Case Report

Quadricuspid aortic valve (QAV) is an uncommon congenital anomaly which was an incidental finding during surgery or autopsy in the past. We present the case of a 44-year-old woman with moderately severe aortic regurgitation due to unequal cusp size QAV diagnosed via transesophageal echocardiography. Due to echocardiographic imaging improvement, the diagnosis of QAV is now easier and earlier than the past.