Final answer:
Endocarditis is an inflammatory disease of the inner lining layer of the heart.
Step-by-step explanation:
An inflammatory disease of the inner lining layer of the heart is called endocarditis.
Endocarditis is a serious infection that involves inflammation of the inner lining of the heart chambers and heart valves (endocardium). It is typically caused by bacterial or, less commonly, fungal infections. Endocarditis can lead to the formation of masses of infected tissue and blood clots on the heart valves or other areas within the heart.