The pericardiophrenic artery is a branch of the internal thoracic artery that supplies blood to the pericardium (the sac that surrounds the heart) and the diaphragm (the muscle that separates the chest from the abdomen). There are several synonyms that can be used for the pericardiophrenic artery, including the thoracicophrenic artery, diaphragmatic artery, and superior phrenic artery. While these terms may not be commonly known outside of medical terminology, it is important for healthcare professionals to be familiar with these synonyms in order to accurately communicate about the anatomy and function of this crucial artery.