Changes

The epicardium should consist of a single layer of epithelial cells in the normal heart with a similar layer lining the opposing pericardial surface.  In this histological section there is an increase in cellularity of the epicardium with many inflammatory cells and pink fibrin is visible.

|Description=Pericarditis histology.  <br> The epicardium should consist of a single layer of epithelial cells in the normal heart with a similar layer lining the opposing pericardial surface.  In this histological section there is an increase in cellularity of the epicardium with many inflammatory cells and pink fibrin is visible.