Cardiomegaly laboratory findings: Difference between revisions
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{{CMG}}; '''Associate Editor in Chief:''' {{CZ}} | {{CMG}}; '''Associate Editor in Chief:''' {{CZ}} | ||
==Overview== | ==Overview== | ||
Laboratory tests that should be obtained when a person is suspected or known to have cardiomegaly are: a [[complete blood count]], [[thyroid stimulating hormone]] levels, and a [[blood urea nitrogen]]. These are common, high yield tests. Other tests can be ordered based on suspicions as to the underlying cause of the cardiomegaly, obtained through patient history and [[physical examination]]. | |||
== Laboratory Findings == | == Laboratory Findings == | ||
Based upon the history and physical, a standard evaluation might include: | Based upon the history and physical, a standard evaluation might include: | ||
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Common high yield tests: | Common high yield tests: | ||
* [[Complete blood count]] ([[CBC]]): to rule out [[anemia]]. | * [[Complete blood count]] ([[CBC]]): to rule out [[anemia]]. | ||
* [[Thyroid stimulating hormone]] ([[TSH]]) | * [[Thyroid stimulating hormone]] ([[TSH]]) | ||
* [[Blood urea nitrogen]] ([[BUN]]) / [[creatinine]]) | * [[Blood urea nitrogen]] ([[BUN]]) / [[creatinine]]) | ||
Less frequent low yield tests: | Less frequent low yield tests: | ||
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* [[Calcium]]: to rule out [[hypocalcemia]]. | * [[Calcium]]: to rule out [[hypocalcemia]]. | ||
* [[Magnesium]]: to rule out [[hypomagnesemia]]. | * [[Magnesium]]: to rule out [[hypomagnesemia]]. | ||
* [[Rheumatoid factor]] | * [[Rheumatoid factor]] | ||
* [[Antinuclear antibody]] ([[ANA]]) | * [[Antinuclear antibody]] ([[ANA]]) | ||
* [[Glucose]] | * [[Glucose]] | ||
* [[Pheochromocytoma]] screening. | * [[Pheochromocytoma]] screening. | ||
* [[Phosphorus]]: to rule out [[hypophosphatemia]]. | * [[Phosphorus]]: to rule out [[hypophosphatemia]]. | ||
* [[Blood culture]] | * [[Blood culture]] | ||
=== Electrolyte and Biomarker Studies === | === Electrolyte and Biomarker Studies === | ||
Latest revision as of 04:03, 9 August 2013
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Cardiomegaly Microchapters |
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Cardiomegaly laboratory findings On the Web |
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Directions to Hospitals Treating Cardiomegaly laboratory findings |
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Risk calculators and risk factors for Cardiomegaly laboratory findings |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor in Chief: Cafer Zorkun, M.D., Ph.D. [2]
Overview
Laboratory tests that should be obtained when a person is suspected or known to have cardiomegaly are: a complete blood count, thyroid stimulating hormone levels, and a blood urea nitrogen. These are common, high yield tests. Other tests can be ordered based on suspicions as to the underlying cause of the cardiomegaly, obtained through patient history and physical examination.
Laboratory Findings
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 culture
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.