Cardiomegaly laboratory findings
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor in Chief: Cafer Zorkun, M.D., Ph.D. [2]
Laboratory tests
Based upon the history and physical, a standard evaluation might include:
Common high yield tests:
- Complete blood count (CBC): to rule out anemia
- Thyroid stimulating hormone (TSH)
- Blood urea nitrogen (BUN) / creatinine
Less frequent low yield tests:
- Erythrocyte sedimentation rate (ESR): to evaluate autoimmune causes
- Calcium: to rule out hypocalcemia
- Magnesium: to rule out hypomagnesemia
- Rheumatoid factor
- Antinuclear antibody (ANA)
- Glucose
- Pheochromocytoma screening
- Phosphorus: to rule out hypophosphatemia
- Blood cultures
Electrolyte and Biomarker Studies
- Electrolytes should be periodically checked in the patient treated with a diuretic to avoid hypokalemia.
- Brain Natriuretic Peptide (BNP) levels may provide insight into the ongoing magnitude of LV dysfunction.