Right-Sided Infective Endocarditis

Infective endocarditis (IE) at the right side represents the 5–10% of IE cases. It is more frequent in people with intravenous drug addiction (IVDA); however, there is another population susceptible to this infection; hemodialytic patients, intracardiac devices, and congenital heart diseases are included inside this group. Right-sided infective endocarditis (RSIE) has lower mortality than the left-sided infective endocarditis (LSIE). Common symptoms secondary to right-sided endocarditis are the respiratory symptoms characterized by a cough, hemoptysis, persistent fever, dyspnea, and chest pain. Echocardiography and blood cultures are the first tools to perform the diagnosis. The tricuspid valve is the main anatomical structure affected. Medical treatment with antibiotic therapy resolves the infection majority of the time; the surgical treatment is indicated in some cases, such as right-heart failure due to severe tricuspid valve regurgitation; inability to eliminate bacteremia or organism; resistance to culture-directed antibiotic treatment, within 7 days; and tricuspid valve vegetations >20 mm. RSIE implies a better prognosis than LSIE. Concomitant left-sided IE carries a worse prognosis than right-sided infection alone, due predominantly to its greater likelihood for invasion and abscess formation