Definition of Pericarditis:

Pericarditis is a condition in which the sac-like covering around the heart (pericardium) becomes inflamed.

See also: Bacterial pericarditis

Causes, incidence, and risk factors:

Pericarditis is usually a complication of viral infections, most commonly echovirus or coxsackie virus. Less frequently, it is caused by influenza or HIV infection.

Infections with bacteria can lead to bacterial pericarditis (also called purulent pericarditis). Some fungal infections can also produce pericarditis.

In addition, pericarditis can be associated with diseases such as:

• Autoimmune disorders
• Cancer (including leukemia)
• HIV infection and AIDS
• Hypothyroidism
• Kidney failure
• Rheumatic fever
• Tuberculosis

Other causes include:

• Heart attack (see post-MI pericarditis)
• Injury (including surgery) or trauma to the chest, esophagus, or heart
• Medications that suppress the immune system
• Myocarditis
• Radiation therapy to the chest

Often the cause of pericarditis remains unknown. In this case, the condition is called idiopathic pericarditis.

Pericarditis most often affects men aged 20 - 50. It usually follows respiratory infections. In children, it is most commonly caused by adenovirus or coxsackie virus.