sternopericardial ligaments sternopericardial ligaments the fibrous pericardium is attached to the posterior surface of the sternum by the superior and inferior sternopericardiac ligaments (sternopericardial ligaments); the upper passing to the manubrium, and the lower to the xiphoid process. sternopericardial ligamentstransverse section of the thorax, showing the contents of the middle and the posterior mediastinum.diagram showing relations of opened heart to front of thoracic wall.detailsidentifierslatinligamenta sternopericardiacata98a12.1.08.003ta23337fma71429anatomical terminology