Late prosthetic valve endocarditis: clinical features influencing therapy

Area of Science:

• Cardiology
• Infectious Diseases
• Cardiac Surgery

Background:

• Late prosthetic valve endocarditis (LPVE) is a serious complication following cardiac valve replacement.
• Identifying clinical features influencing LPVE outcomes is crucial for timely therapeutic decisions.

Purpose of the Study:

• To evaluate clinical characteristics associated with survival in patients diagnosed with LPVE.
• To determine prognostic indicators for guiding treatment strategies in LPVE.

Main Methods:

• Retrospective analysis of 43 patients with LPVE.
• Assessment of clinical features including etiology (streptococcal vs. non-streptococcal), presence of new regurgitant murmurs, and severity of congestive heart failure (CHF).
• Statistical comparison of survival rates based on these clinical factors.

Main Results:

• Overall survival rate for LPVE was 47% (20 of 43 patients).
• Survival was significantly higher in streptococcal LPVE (61%) versus non-streptococcal LPVE (36%).
• Patients without new regurgitant murmurs (69%) and mild/no CHF (71%) had better survival than those with these conditions (33% and 16%, respectively).
• The presence of two or more risk factors (non-streptococcal etiology, new murmur, moderate/severe CHF) correlated with 50-90% mortality.
• Fever, murmurs, conduction disturbances, and relapse indicated myocardial invasion.

Conclusions:

• Clinical features like non-streptococcal etiology, new regurgitant murmurs, and moderate to severe CHF are strong predictors of poor outcomes in LPVE.
• Early surgical intervention should be considered for patients presenting with these high-risk features or suspected myocardial invasion.
• Medical therapy and late reoperation are associated with unfavorable prognoses in LPVE.