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MR Angiography of Bilateral Subclavian Vessels — With/Without Intravenous Contrast

Published: August 9, 2026Updated: August 16, 2026

Imaging of the major arteries supplying both arms, performed with or without intravenous contrast to evaluate blood flow and vessel narrowing.

Quick summary

["This MRA checks the arteries supplying both arms for narrowing, blockage, or other abnormalities."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
99608-2
Short code
MRA Subclavian ves-Bl WO+W contr IV
Synonyms
MRA Subclavian ves-Bl WO+W contr IV
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr-angio
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

Magnetic resonance angiography (MRA) creates detailed images of the subclavian arteries, which are the main blood vessels supplying the arms. It may be performed before and after intravenous contrast is given.

Why might I need this test?

This test may be ordered to investigate symptoms such as arm fatigue, coldness, pain, or reduced blood pressure differences between the arms. It can help evaluate suspected arterial narrowing, blockage, or the anatomy of nearby blood vessels.

How is the test performed?

You will lie on a table inside an MRI scanner while images of the blood vessels are taken. If contrast is used, it is given through a vein in your arm; the scan may then be repeated with contrast-enhanced images.

How do I prepare for the test?

Follow the instructions provided by the imaging center. Tell the care team if you have metal implants, a pacemaker, kidney disease, a prior contrast reaction, or are pregnant, because these factors may affect the exam or its safety.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing or blockage of a subclavian artery, sometimes called subclavian artery stenosis. Reduced blood flow can contribute to arm fatigue, coldness, pain, or differences in blood pressure between the arms, and other conditions may also produce similar symptoms.

Short name

Bilateral Subclavian Vessel MRA

Frequently asked questions

Does this test use radiation?
No. Magnetic resonance angiography uses a magnetic field and radio waves rather than X-ray radiation.
Why might contrast be used?
Intravenous contrast can make blood vessels easier to see and may help identify narrowing or other abnormalities. Some examinations include both non-contrast and contrast-enhanced images.
Can I have this test if I am claustrophobic?
Tell the imaging center before your appointment. Sedation or other accommodations may be available, depending on local policies and your medical history.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy