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Robert Bauernschmitt
Heinz G. Jakob
Siegfried Hagl
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Ann Thorac Surg 1998;65:359-364
© 1998 The Society of Thoracic Surgeons

Original Articles: Cardiovascular

Operation for Infective Endocarditis: Results After Implantation of Mechanical Valves

Robert Bauernschmitt, MD, Heinz G. Jakob, MD, Christian-Friedrich Vahl, MD, Rüdiger Lange, MD, Siegfried Hagl, MD

Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany

Dr Bauernschmitt, Dept of Cardiac Surgery, University of Heidelberg, INF 110, 69120 Heidelberg, Germany.

Presented at the "Meet the Expert Session" of the Thirty-third Annual Meeting of The Society of Thoracic Surgeons, San Diego, CA, Feb 3–5, 1997.

Background. Operation for acute endocarditis during the active phase violates a basic surgical rule not to implant a foreign body into an infective process, resulting in a high operative mortality and the risk of early recurrent endocarditis. Several investigators analyzing risk factors for perioperative mortality and morbidity presented strategies for more favorable outcomes, but most studies suffer from the drawback of heterogeneous populations observed over a long period of time.

Methods. We present a prospective study on 138 patients operated on from March 1988 to March 1996. Patients were only included if the activity of the infection was proved by positive culture of the valve leaflets or by histologic staining. During the observation period, indication for operation, surgical approach, and postoperative antibiotic therapy were standardized as much as possible. After radical debridement of all parts of infected tissue, valve replacement was carried out with mechanical prostheses.

Results. The early mortality was 11.5% overall. High New York Heart Association functional classification, advanced age, and staphylococcal disease were significant risk factors for early mortality. The site of infection, multiple valve involvement, and prosthetic valve endocarditis did not affect the outcome. Early recurrent endocarditis was recorded in only 3 patients of the entire series.

Conclusions. In case of acute infective endocarditis, valve replacement with mechanical prostheses is a safe procedure, if radical operation and aggressive postoperative antibiotic therapy are performed. For further improvements of the results, earlier operation is advisable in patients with rapidly progressive cardiac deterioration and in most cases of staphylococcal endocarditis.






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