Abstract
Acute pericarditis and cardiac tamponade without a definite cause at the time of the initial hospital evaluation are defined as primary acute pericardial disease. In immunologically competent patients from the Western World, most cases (more than 80%) are idiopathic. However, severe specific diseases may be present in the remaining cases, the clinical features often providing insufficient clues to the etiologic diagnosis. A systematic approach to these patients is therefore needed. It is relevant to this approach that pericardiocentesis and pericardial biopsy have a much higher diagnostic yield when performed in patients with cardiac tamponade than when they are performed for purely diagnostic purposes. Strategies to increase this yield might be devised on the basis of noninvasive findings.
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