Mediastinitis following cardiac surgery

Purpose: To identify risk factors for mortality in patients who developed mediastinitis post cardiac surgery via sternotomy.Methods: Retrospective study conducted in the cardiothoracic surgery department of HMPIT between January 1 2010 and December 31 2019. Mediastinitis was defined as a deep infection of the surgical site requiring revision surgery with positive bacteriological samples or a macroscopic aspect of infection.Mortality risk factors were sought from data relating to the patient the initial surgery the post-CEC operative follow-up and the pre- per- and postoperative management of revision surgery.Results: 55 patients were included. The mortality rate in these patients was 30.9%.The risk factors incriminated in the multivariate analysis were age over 60 years and admission in a critical condition in contrast to a preserved LVEF which was a protective factor.The microorganisms most frequently identified in bacteriological cultures were staphylococci mainly aureus.