The pericarditis remains the most common pericardial pathology in clinical practice. A variety of forms and clinical manifestations, often less pronounced or masked by the symptoms of comorbidities, determine the hypodiagnosis of pericarditis.
The European guidelines for the diagnosis and management of pericarditis was updated in 2015 and giving certain practical algorithms.
The article presents both new recommendations and classic ideas about clinical diagnostics, which do not lose their positions. The terminological definitions, approaches to classification are systematized; the treatment regimens of individual etiological forms of pericarditis are given.

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