Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Endocarditis ?
    ### Response:
    Endocarditis (EN-do-kar-DI-tis) is an infection of the inner lining of the heart chambers and valves. This lining is called the endocardium (en-do-KAR-de-um). The condition also is called infective endocarditis (IE).
                
The term "endocarditis" also is used to describe an inflammation of the endocardium due to other conditions.
    