Endocarditis is infection of the inside lining of the heart chambers and valves (endocardium). Bacterial infection, often from another part of the body, such as the mouth, is the most common source of endocarditis. The bacteria spread throughout the bloodstream and attach to damaged areas of the heart. Most people who develop endocarditis have heart disease of the valves or other heart defects.

Symptoms may include chills, excessive sweating, fever, fatique, aches and pains, night sweats, paleness, shortness of breath with activity swelling of the legs, feet and abdomen, weakness and weight loss. Treatments for endocarditis include antibiotics and, in severe cases, surgery.