What term describes an infection of the endothelial surface of the heart?

The correct term for an infection of the endothelial surface of the heart is endocarditis. This condition specifically refers to the inflammation of the endocardium, which is the inner lining of the heart, including the heart valves. Endocarditis can occur when bacteria or other infectious agents enter the bloodstream and settle on heart tissues, leading to serious complications such as damage to the heart valves, septicemia, and embolic events.

Myocarditis refers to inflammation of the myocardium, which is the muscular layer of the heart. While it can be caused by infections, it primarily affects the heart muscle itself rather than the endothelial lining.

Pericarditis involves inflammation of the pericardium, the fibrous sac surrounding the heart, and does not directly affect the endothelial surface.

Valvular heart disease describes conditions that affect one or more of the heart valves, such as stenosis or regurgitation, but does not specifically denote an infection of the endothelial surface.

Thus, endocarditis is the most accurate term that describes an infection of the endothelial surface of the heart.