The following laboratory studies may be performed in patients with suspected pericardial effusion:
Electrolyte levels
CBC count with differential
Cardiac biomarker levels (eg, troponin, CK-MB, LDH)
Tests for other markers of inflammation (eg, ESR, CRP)
TSH level
Blood cultures
RF levels
Immunoglobulin complex tests
ANA tests
Complement levels
Pericardial fluid analysis