[A case report of successful emergency re-AVR for structural failure of a Hall-Kaster prosthesis]

A rare case of Hall-Kaster prosthetic valve dysfunction was reported. The patient was admitted with acute cardiac failure. She had previously received aortic valve replacement (AVR) using 23A Hall-Kaster prosthesis. Prosthetic valve dysfunction was diagnosed by both cinefluoroscopy and echocardiography. Emergent re-AVR was carried out and dislodgement of the pivot was revealed. Postoperative course was uneventful. Reports of structural failure of the Hall-Kaster (Medtronic-Hall) prosthesis are extremely rare. To our knowledge, this is the first reported case of dislodgement of the disc from the pivot of the Hall-Kaster prosthesis.