Record number: 687Adverse Occurrence type: Graft failureMPHO Type: Heart valvesAlerting signals, symptoms, evidence of occurrence: Intraoperative adverse event requiring repairDemonstration of imputability or root cause: Allograft specificKeywords: heart valveintraoperativestructuralallogeneicReferences: Aortic allograft valve reoperation: surgical challenges and patient risks