👉 The term "subpericardial" is used to describe a region within the heart that lies below the right atrium and is not part of the pericardium. It is located at the level of the left heart border, just behind the left ventricle. The subpericardial space is where blood flows between the left atrium and the right ventricle. This region plays a crucial role in maintaining the structural integrity and function of the heart by providing nutrients,