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Published on: January 7, 2019
Surgical treatment of active infective endocarditis: a continued challenge
Tirone E David1, Gheorghe Gavra, Christopher M Feindel
1Division of Cardiovascular Surgery of Toronto General Hospital and University of Toronto, Toronto, Ontario, Canada. tirone.david@uhn.on.ca
Insights
Surgery for active infective endocarditis remains challenging, with high mortality rates. Key predictors of poor outcomes include preoperative shock, prosthetic valve endocarditis, and Staphylococcus aureus infections.
Area of Science:
- Cardiovascular Surgery
- Infectious Diseases
- Cardiac Valve Surgery
Background:
- Active infective endocarditis (IE) is a serious condition requiring surgical intervention.
- Outcomes of surgical treatment for IE can vary significantly based on patient and disease factors.
Purpose of the Study:
- To evaluate the surgical outcomes in a large cohort of patients with active infective endocarditis.
- To identify predictors of mortality and long-term survival after IE surgery.
Main Methods:
- A retrospective analysis of 383 consecutive patients undergoing surgery for active IE.
- Data collected included patient demographics, valve status (native vs. prosthetic), causative microorganisms, surgical procedures, and follow-up duration.
- Statistical analysis identified independent predictors of operative mortality and overall survival.
Main Results:
- Operative mortality was 12%, with no significant change over time.
- Late deaths occurred in 23% of patients.
- Independent predictors of operative mortality included preoperative shock, prosthetic valve endocarditis, paravalvular abscess, and Staphylococcus aureus.
- Fifteen-year survival was 44% overall, with lower survival for prosthetic valve endocarditis (25%) compared to native valve endocarditis (59%).
Conclusions:
- Surgery for active infective endocarditis is associated with substantial operative mortality and morbidity.
- Factors such as age, shock, prosthetic valve endocarditis, impaired ventricular function, and recurrent infections negatively impact long-term survival.
- Despite challenges, surgical intervention remains critical for managing active IE.
Objective:
This study was undertaken to examine the outcomes of surgery for active infective endocarditis in a large cohort of patients.
Methods:
Three hundred eighty-three consecutive patients underwent surgery for active infective endocarditis. The mean age was 51 +/- 16 years, and 64% were men. The infected valve was native in 266 patients and prosthetic in 117. Staphylococcus aureus was the most common microorganism. Surgery consisted of valve replacement or repair in patients with infection limited to the cusps or leaflets of the valve or radical resection of seemingly infected paravalvular tissues, and reconstruction with patches and valve replacement in patients with abscess (135 patients). The mean follow-up was 6.1 +/- 5.2 years.
Results:
There were 45 (12%) operative and 88 (23%) late deaths. The operative mortality did not change during the period of study. Preoperative shock, prosthetic valve endocarditis, paravalvular abscess, and S aureus were independent predictors of operative mortality. Age, shock, prosthetic valve endocarditis, left ventricular ejection fraction less than 40%, and recurrent endocarditis were independent predictors of death from all causes. Survivals at 15 years were 44% +/- 5% overall, 59% +/- 5% for native valve endocarditis, and 25% +/- 7% for prosthetic valve endocarditis (P = .001). Freedom from recurrent endocarditis at 15 years was 86% +/- 3% for all patients, similar to those for native and prosthetic valve endocarditis (P = .39). Freedom from reoperation at 15 years was 70% +/- 6% for all patients, similar to those for native and prosthetic valve endocarditis (P = .55).
Conclusions:
Surgery for endocarditis continues to be challenging and associated with high operative mortality and morbidity. Age, shock, prosthetic valve endocarditis, impaired ventricular function, and recurrent infections adversely affect long-term survival.
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