Study note

Mechanism and antecedents of chronic constrictive pericarditis

THE CONTEXT
Chronic constrictive pericarditis restricts cardiac filling through progressive structural disease of the pericardium.

Structural changes and functional effects

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Pericardial disease: Progressive thickening, fibrosis and calcification encase the heart in a solid shell, preventing proper filling.
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Myocardial involvement: Calcification may extend into the myocardium and impair contraction in addition to the filling abnormality.

Preceding conditions

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Tuberculous pericarditis: The condition often follows an attack of tuberculous pericarditis.
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Other antecedents: Constrictive pericarditis can complicate haemopericardium, viral pericarditis, rheumatoid arthritis and purulent pericarditis.
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Unidentified cause: The original insult is often impossible to identify.
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