Acute pericarditis Includes:acute mediastinopericarditisacute myopericarditisacute pericardial effusionacute pleuropericarditisacute pneumopericarditisExcludes1Dressler's syndrome (I24.1)rheumatic pericarditis (acute) (I01.0)viral pericarditis due to Coxsakie virus (B33.23)