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[Postoperative bacterial endocarditis after cardiac prosthesis (author's transl)]
Giornale Italiano Di Cardiologia
|January 1, 1975
Summary
Postoperative endocarditis, a serious complication, often involves Gram-negative bacteria. Prolonged antibiotic treatment is proposed as a primary therapy, reserving surgery for specific complications.
Area of Science:
- Cardiovascular Surgery
- Infectious Diseases
- Medical Microbiology
Background:
- Infection of endocardial prostheses (valvular or septal patch) is a significant post-operative risk.
- Postoperative endocarditis presents a frequent and dangerous complication following cardiac surgery.
Purpose of the Study:
- To analyze the clinical characteristics and outcomes of postoperative endocarditis.
- To evaluate the efficacy of medical versus surgical management strategies for prosthetic valve endocarditis.
Main Methods:
- Retrospective analysis of 11 patients with postoperative endocarditis (9 on valve prostheses, 2 on septal patches).
- Identification of causative microorganisms from blood cultures.
- Comparison of outcomes based on treatment approach (medical vs. surgical).
Main Results:
- Early infections (within 7 patients) were predominantly caused by Gram-negative bacteria (6/7).
- Late infections (within 4 patients) involved Staphylococcus aureus, Streptococcus viridans, and Klebsiella pneumoniae (3/4).
- Only 3 of 11 patients survived; one with prosthesis replacement, two with prolonged antibiotic therapy.
Conclusions:
- A 5-week course of high-dose, specific antibiotics is proposed as the primary treatment for postoperative endocarditis.
- Surgical intervention should be reserved for cases with prosthetic malfunction, thrombosis, embolization, or medical treatment failure.