<unk>  is a condition in which the sac-like covering surrounding the heart (the pericardium) becomes inflamed.  Symptoms of<unk>  include chest pain which increases with deep breathing and lying flat.
Pericarditis
Myopericarditis
Constrictive pericarditis
Myocarditis
Cholesterol pericarditis
Endocarditis
Angina pectoris
Cardiac tamponade