Endovascular infections arising from right-sided heart structures

Area of Science:

• Cardiology
• Infectious Diseases
• Internal Medicine

Background:

• Right-sided endocarditis involves infections of the heart's right side, accounting for 5-10% of all endocarditis cases.
• Common risk factors include intravenous (IV) drug abuse and congenital heart disease, with Staphylococcus aureus being the most frequent pathogen.
• Clinical presentation may lack early cardiac murmurs, but symptoms like fever, dyspnea, and cough are common, alongside potential peripheral embolic lesions.

Purpose of the Study:

• To outline the distinct etiologies, pathophysiology, clinical features, diagnostic methods, and treatment strategies for right-sided endocarditis.
• To compare the prognosis of right-sided endocarditis with left-sided endocarditis and identify factors influencing outcomes.

Main Methods:

• Review of existing literature on right-sided endocarditis.
• Analysis of clinical manifestations, diagnostic imaging (echocardiography, chest radiography), and treatment outcomes.
• Identification of common pathogens and predisposing factors.

Main Results:

• Echocardiography is effective in detecting tricuspid valve vegetations; chest radiographs show characteristic multiple septic pulmonary emboli.
• Complications include pulmonary infarction, abscess, right-sided heart failure, and renal abnormalities.
• Treatment typically involves 4 weeks of high-dose IV antibiotics, with surgery indicated for refractory cases, fungal infections, or specific resistant organisms.

Conclusions:

• Right-sided endocarditis has a generally favorable prognosis compared to left-sided, particularly in IV drug users with S. aureus infections.
• Fungal infections, Pseudomonas, Serratia, and significant right-sided heart failure are associated with a poorer prognosis.
• Prompt diagnosis and appropriate, prolonged antibiotic therapy are crucial for favorable outcomes.