<unk>  is the chronic inflammation of the pericardium, the sac-like covering of the heart that contains a thin layer of fluid.<unk>  is when the pericardial sac becomes chronically inflamed (with thickening, scarring, and muscle tightening) and loses its elasticity. This inflammation makes it difficult for the heart to stretch properly when it beats, resulting in the heart chambers not filling up with enough blood and the blood then accumulates behind the heart, causing heart swelling and other symptoms of heart failure.
Constrictive pericarditis
Cholesterol pericarditis
Radiation induced pericarditis
Tuberculous pericarditis
Stress cardiomyopathy
Uremic pericarditis
Myopericarditis
Aicardi syndrome