Laboratory investigations for pericardial effusion include the leukocyte count, C-reactive protein, and ESR for ruling out inflammatory causes.  The cardiac troponin is elevated if there is an injury to the underlying myocardium, a condition termed as myopericarditis.  Diagnostic pericardiocentesis and biopsy help in identifying an underlying infectious or malignant process.
Pericardial effusion laboratory studies
Pericardial effusion physical examination
Pericarditis laboratory studies
Pericardial effusion echocardiography
Pericardial effusion CT
Chest pain echocardiography
Pericardial effusion electrocardiogram
Pulmonary embolism electrocardiogram