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Magnetic Resonance Imaging of the Heart with Intravenous Contrast

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

Cardiac MRI uses magnetic imaging and intravenous contrast to create detailed pictures of the heart's structure, blood flow, and function.

Quick summary

["This imaging test helps evaluate heart anatomy, blood flow, and tissue function in greater detail than many other cardiac tests."]

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

Key facts at a glance

LOINC
36197-2
Short code
MR Hrt W contr IV
Synonyms
MR Hrt 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
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?

This is a cardiac MRI, also called magnetic resonance imaging of the heart. It produces detailed images of the heart, nearby blood vessels, and sometimes surrounding tissues without using radiation.

Why might I need this test?

A clinician may order this test to investigate unexplained symptoms, assess heart muscle function, evaluate blood flow, or look for structural heart disease, including congenital abnormalities, cardiomyopathy, or coronary artery disease.

How is the test performed?

You usually lie on a table inside a large MRI scanner. The scanner takes many pictures while a technologist monitors you, and intravenous contrast may be given to improve the visibility of certain tissues and blood vessels.

How do I prepare for the test?

Follow the imaging center's instructions, including whether you need to fast. Tell the care team about any prior contrast reaction, kidney disease, pregnancy, metal implants, or other health conditions before the appointment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate heart muscle disease, impaired blood flow, coronary artery disease, inflammation, congenital heart abnormalities, or problems with the heart valves. The radiologist interprets the images in the context of your symptoms, examination, and other tests. Results should be reviewed with the clinician who ordered the MRI.

Short name

Contrast-enhanced cardiac MRI

Frequently asked questions

Does a cardiac MRI use radiation?
No. Cardiac MRI uses magnetic fields and radio waves rather than ionizing radiation.
What is intravenous contrast used for?
Intravenous contrast can improve the visibility of the heart's tissues and blood vessels. The team will confirm in advance whether you need it and review any allergy or kidney-related concerns.
Will I be able to drive home afterward?
Most people can leave normally, but sedation is occasionally used for some examinations. If sedation is planned, the imaging center will explain transportation and post-procedure instructions.
  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