The pericardium is a fluid-filled sac that keeps the heart in its proper anatomical position, maintains stable intracardiac pressures, and shields the heart from the spread of malignancy and infection (Hayase et al. 2020; Rodriguez and Tan 2017). Knowledge of vascular supply to the pericardium is crucial for surgeons and proceduralists alike for open surgical and endovascular procedures such as percutaneous coronary interventions (PCIs), radiofrequency ablations, and embolization procedures.