Quadricuspid aortic valve: a rare cause of aortic insufficiency diagnosed by Doppler echocardiography. Report of two cases and review of the literature

Antonino Recupero; Fabrizio Rizzo; Francesco Arrigo; Pietro Pugliatti; Sebastiano Coglitore

Quadricuspid aortic valve: a rare cause of aortic insufficiency diagnosed by Doppler echocardiography. Report of two cases and review of the literature