I30: Acute pericarditis

I30.0: Acute nonspecific idiopathic pericarditis

The pericardium is a layer of connective tissue surrounding the heart. There is some fluid in the pericardium (heart sac). So the heart is able to move inside this lining. Your pericardium is inflamed. The cause of this is unknown.

Pericarditis can cause a high temperature and chest pain, for example.