title: Surgical treatment of culture-negative aortic infective endocarditis.
abstract: BACKGROUND
  We retrospectively analyzed the results of operations done for culture-negative aortic infective endocarditis at a single center over a period of 26 years.
  
  
  METHODS
  From June 1985 to January 2011, we operated on 82 patients with infective endocarditis of the aortic valve for which the results of culture were negative. Sixty-five of the patients (79.3%) were male and the patients' mean age was 38.0±14.4 years (range, 9 to 73 years). Nineteen of the patients (23.2%) had a history of previous cardiac surgery, and 16 of the patients (19.5%) had endocarditis of a prosthetic valve. Two patients (2.4%) had conduction blocks. The mean duration of follow-up was 7.1±4.3 years (range, 0.1 to 16.9 years), yielding a total of 477.0 patient-years for the study population.
  
  
  RESULTS
  One hundred and thirty-eight procedures were done on the 82 patients in the study. The most common procedure was aortic valve replacement, which was done on 67 patients (81.7%). Thirty-nine patients (47.6%) had concomitant procedures done on the mitral valve. In-hospital death occurred in 14 patients (17.1%). Postoperatively, 17 patients (20.7%) had a low cardiac output and 9 patients (11.0%) had heart block, of whom 3 required implantation of a permanent pacemaker. The actuarial rate of survival of the patient population at 1, 5, 10, and 15 years was 92.5%±3.2%, 85.6%±4.5%, 82.5±5.3%, and 72.2±10.7% respectively.
  
  
  CONCLUSIONS
  Culture-negative infective endocarditis is a major problem in the diagnosis and treatment of a significant proportion of cases of endocarditis. Most of the affected patients are in a healed state, which could be a cause of negative culture results. In-hospital mortality in patients with culture-negative infective aortic endocarditis is associated with a history of previous cardiac surgery, whereas long-term mortality in this patient population is associated with nonaortic procedures.
authors: Department of Cardiovascular Surgery, Bagcilar Training and Research Hospital, Istanbul, Turkey. adilpol@yahoo.com
authors: Adil
authors: A
authors: Polat
authors: Altug
authors: A
authors: Tuncer
authors: Eylem Yayla
authors: EY
authors: Tuncer
authors: Ilker
authors: I
authors: Mataraci
authors: Eray
authors: E
authors: Aksoy
authors: Arzu Antal
authors: AA
authors: Donmez
authors: Mehmet
authors: M
authors: Balkanay
authors: Rahmi
authors: R
authors: Zeybek
authors: Cevat
authors: C
authors: Yakut
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001022:Aortic Valve Insufficiency / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000601:surgery; D002648:Child; D003937:Diagnosis, Differential; D004696:Endocarditis / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D017052:Hospital Mortality / Q000639:trends; D006801:Humans; D008297:Male; D008875:Middle Aged; D016459:Prosthesis-Related Infections / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D012086:Reoperation; D012189:Retrospective Studies; D012307:Risk Factors; D015996:Survival Rate / Q000639:trends; D013997:Time Factors; D016896:Treatment Outcome; D014421:Turkey / Q000453:epidemiology; D055815:Young Adult