Illustration comparing a healthy heart (top inset), to a heart with pericarditis (bottom inset). Pericarditis is a condition in which the pericardium around the heart becomes inflamed. The pericardium is composed of two protective layers containing fluid that prevents friction from occurring. Potential causes of pericarditis include: viral, bacterial, or fungal infections, heart surgery, heart attack, various medications, and some medical conditions and injuries.
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