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Infective endocarditis update experience from a heart hospital
Insights
Prosthetic valve endocarditis has a 71% mortality rate, significantly higher than natural valve endocarditis (19%). Key differences include congenital heart disease in natural valves and central nervous system embolization in prosthetic valves.
Area of Science:
- Cardiology
- Infectious Diseases
- Valvular Heart Disease
Background:
- Infective endocarditis (IE) is a serious infection affecting heart valves.
- Distinguishing between natural valve endocarditis (NV) and prosthetic valve endocarditis (PV) is crucial for understanding outcomes.
Purpose of the Study:
- To compare mortality rates and clinical features of IE in patients with natural valves versus prosthetic valves.
- To identify specific risk factors and complications associated with NV and PV.
Main Methods:
- Retrospective study of 50 patients diagnosed with infective endocarditis.
- Analysis of patient demographics, valve type (natural vs. prosthetic), comorbidities, clinical manifestations, and outcomes.
Main Results:
- Overall IE mortality was 44%. NV group: 19% mortality; PV group: 71% mortality.
- Congenital heart disease (bicuspid aortic valve) was more common in the NV group (50% vs. 17%).
- Rheumatic heart disease was more prevalent in the PV group (83% vs. 46%). PV patients had higher rates of embolization to the CNS, spleen, and kidney.
Conclusions:
- Prosthetic valve endocarditis carries a significantly higher mortality risk compared to natural valve endocarditis.
- Distinct underlying pathologies (congenital vs. rheumatic heart disease) are associated with NV and PV.
- Early surgery for late PV and further research into host response are recommended to improve outcomes.
Abstract:
In a retrospective study of 50 patients with infective endocarditis (IE), we found an overall mortality of 44%: among the 26 patients with natural valves (NV) the mortality was 19%; among the 24 with prosthetic valves (PV) it was 71%. Congenital heart disease was recognized in 17 of our cases, with a significant clustering in the NV group (50% vs 17%, p = 0.029); the most frequently encountered malformation was the bicuspid aortic valve. The incidence of rheumatic heart disease was 46% in the NV group and 83% in the PV group (p = 0.015). Manifestations of IE were protean and multisystemic. We calculated an average of 4.6 symptoms and 4.7 signs for each patient. Although sepsis was abated with appropriate antibiotics, death often ensued from multiple complications: congestive heart failure, arrhythmia, stroke, embolic myocardial infarction, valvular destruction or dehiscence, coagulopathy. New features of natural valve infective endocarditis are a rising incidence in the elderly and a survival rate seemingly at its peak. Features of prosthetic valve infective endocarditis include overwhelmingly frequent embolization to the central nervous system (p = 0.004), spleen (p = 0.009) and kidney (p = 0.010). Advances in therapy for this disease may come from early surgery in late prosthetic valve endocarditis and from future prospective studies to define how the host response influences the outcome.