Pericarditis - Definition and Diagnostic Criteria Acute Pericarditis • Inflammatory pericardial syndrome to be diagnosed with at least 2 of the 4 following criteria: (1) pericarditic chest pain (2) pericardial rubs (3) new widespread ST-elevation or PR depression on ECG (4) pericardial effusion (new or worsening) • Additional supporting findings: - Elevation of markers of inflammation (i.e. C-reactive protein, erythrocyte sedimentation rate, and white blood cell count); - Evidence of pericardial inflammation by an imaging technique (CT. CMR). Incessant Pericarditis: Pericarditis lasting for >4-6 weeks but <3 months without remission. Recurrent Pericarditis: Recurrence of pericarditis after a documented first episode of acute pericarditis and a symptom-free interval of 4-6 weeks or longer. Chronic Pericarditis: Pericarditis lasting > 3 months. #Pericarditis #diagnosis #criteria #cardiology #chronic