[Clinical aspects of staphylococcal endocarditis]

Area of Science:

• Cardiology
• Infectious Diseases
• Valvular Heart Disease

Context:

• Retrospective review of 50 patients with Staphylococcus endocarditis at Cantonal Hospital Lucerne (1971-1988).
• Staphylococcus endocarditis represented 29% of all infective endocarditis cases during the study period.
• Analysis of patient demographics, valve involvement, predisposing factors, diagnostic challenges, and outcomes.

Purpose:

• To analyze the clinical characteristics, predisposing factors, diagnostic difficulties, and outcomes of Staphylococcus endocarditis.
• To identify risk factors and common presentations of this severe infection.
• To evaluate mortality rates and factors influencing prognosis.

Summary:

• Staphylococcus endocarditis commonly affected mitral (48%), aortic (36%), and tricuspid (30%) valves, with 54% involving previously normal valves.
• Predisposing factors included intravenous drug addiction and diabetes (52%); diagnosis was often delayed (average 11 days) and symptoms were nonspecific.
• Overall mortality was 51%, associated with age, heart failure, uncontrolled infection, and cerebral embolism; isolated right heart endocarditis had a better prognosis.

Impact:

• Highlights the significant morbidity and mortality associated with Staphylococcus endocarditis.
• Underscores the importance of considering Staphylococcus endocarditis in patients with risk factors, even with nonspecific symptoms.
• Emphasizes the need for prompt diagnosis and management to improve patient outcomes, particularly for those with high-risk valve involvement.