Endocarditis is an infection of the inner lining of the heart chambers and valves, often caused by bacteria or other pathogens entering the bloodstream and attaching to damaged areas of the heart. Endocardial disease encompasses a range of conditions affecting the endocardium, including non-infectious causes such as autoimmune disorders and malignancies. Both conditions can lead to serious complications like heart valve damage, systemic embolism, or heart failure if not promptly recognized and treated.

Several factors increase the risk of developing endocarditis, including pre-existing heart conditions such as rheumatic heart disease, congenital heart defects, or prosthetic heart valves. Intravenous drug use, poor dental hygiene, and certain medical procedures that may introduce bacteria into the bloodstream further elevate the risk. Immunocompromised individuals and those with chronic illnesses also face enhanced vulnerability to endocardial diseases.

Symptoms of endocarditis can vary but typically include fever, chills, fatigue, and night sweats. Patients may also experience symptoms related to embolic events, such as pain in limbs or organs, and signs of heart failure, including shortness of breath and swelling in the legs. In some cases, petechiae or Janeway lesions may be observed on the skin, indicating systemic involvement.

Endocarditis is primarily caused by bacteria or, less commonly, fungi entering the bloodstream and attaching to damaged areas of the heart's inner lining, known as the endocardium. Risk factors include pre-existing heart conditions, intravenous drug use, and procedures that may introduce pathogens into the bloodstream, such as dental work or surgery. In addition, certain immunocompromised states can increase susceptibility to infections that lead to endocarditis, underscoring the importance of preventive measures in at-risk populations.

Diagnosis of endocarditis often involves a combination of clinical evaluation and diagnostic tests, including blood cultures to identify the causative organism, echocardiography to visualize heart structures, and laboratory tests to assess overall health. The modified Duke criteria, which weigh clinical, microbiological, and echocardiographic findings, are commonly used to establish the diagnosis. Early identification and management are crucial to prevent severe complications.

The treatment for endocarditis typically involves prolonged courses of intravenous antibiotics tailored to the specific organism causing the infection. In some cases, surgical intervention may be necessary to repair or replace damaged heart valves or to remove infected tissue. Early diagnosis and aggressive management are critical, as untreated endocarditis can lead to severe complications, including heart failure, embolic events, and widespread organ damage.

Preventive measures for endocarditis primarily focus on minimizing risk factors, particularly in individuals with congenital or acquired heart conditions. Good oral hygiene and regular dental check-ups are essential, as dental procedures can introduce bacteria into the bloodstream. In some cases, prophylactic antibiotics may be recommended before certain medical and dental procedures for high-risk patients to further reduce the chance of infection.