Figure 27

Fibrous pericardial effusion (PE) helps to delineate the two normal layers of the pericardial sac: visceral pericardium (VP) and parietal pericardium (PP).
Subepicardial fat (SEF) is located just beneath the visceral layer of pericardium.

B.F. Waller and R.C. Schlant: Anatomy of the Heart: Hurst's The Heart, 8th ed, p 76.