Glossary of Terms
The inner surface of the heart muscle. The heart muscle wall is divided into inner and outer surfaces. The inside surface lines the inner chambers of the heart. The outer surface of the heart, where the coronary arteries are located, is known as the epicardial surface of the heart. A heart attack, also known as a "myocardial infarction" that injures the full thickness of the heart is know as an endocardial infarct and is usually more severe than a partial thickness infarct.