Infective Endocarditis

Excerpt

Infective endocarditis is an inflammatory condition of the endocardium, the inner lining of the heart, including the valves that separate its 4 chambers. This condition is primarily caused by microbial infection, most commonly bacteria, and is associated with a broad spectrum of clinical manifestations and potential complications. The concept of infective endocarditis as a microbial disease was first proposed in 1869 by Emanuel Winge and Hjalmar Heiberg, who identified "rosary-like" vegetations on cardiac valves during autopsies of patients who died from sepsis. Subsequent investigations, including those by Louis Pasteur, established the link between circulating pathogens and endocardial infection through blood culture analysis.

If not recognized and treated promptly, infective endocarditis can result in both intracardiac damage and systemic complications. In 1885, William Osler further characterized the disease by describing the association between microorganisms and embolic phenomena and by identifying features consistent with the Osler triad—pneumonia, meningitis, and endocarditis—particularly in cases caused by Streptococcus pneumoniae. A thorough clinical evaluation, including detailed history-taking and physical examination, remains essential for early diagnosis and appropriate management, thereby reducing associated morbidities and mortality.