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CT Heart Calcium Score, With or Without IV Contrast

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

A CT scan of the heart that may include coronary calcium scoring. The protocol determines whether IV contrast is used; calcium scoring alone is usually performed without contrast.

Quick summary

["This scan can assess coronary artery calcium and, when contrast is used, provide detailed images of the heart and nearby blood vessels."]

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

Key facts at a glance

LOINC
86980-0
Short code
CTA Hrt+CA WO+W contr IV
Synonyms
CTA Hrt+CA 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
ct-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?

This is a CT imaging test of the heart that may include a coronary artery calcium score. A calcium score measures the amount of calcium detected in the coronary arteries, while contrast-enhanced CT provides detailed images of the heart, coronary arteries, and nearby structures.

Why might I need this test?

A clinician may order this test to evaluate coronary artery calcification, investigate heart-related symptoms, or assess the heart and nearby blood vessels. The information can help estimate the amount of atherosclerotic plaque and guide further evaluation or prevention decisions.

How is the test performed?

You lie on a table while a CT scanner takes X-ray images from different angles. A coronary calcium score is generally obtained without contrast. If your protocol includes contrast, an IV line may be used to administer it, and the scan usually takes longer.

How do I prepare for the test?

Follow the imaging center's specific instructions. Tell the care team about any prior contrast reaction, kidney disease, pregnancy, or possible allergy, and ask whether you need to avoid food, caffeine, or certain medicines before the examination.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Heart CT and Calcium Score

Frequently asked questions

Will I receive IV contrast for this CT?
It depends on the ordered protocol. A coronary calcium score is usually performed without contrast, while a detailed heart or blood vessel study may include IV contrast.
Is a calcium score the same as a contrast-enhanced heart CT?
No. A calcium score is a noncontrast measurement of coronary artery calcium, whereas a contrast-enhanced CT creates more detailed images of the heart and blood vessels. One order may include both components.
Why is IV contrast sometimes used?
IV contrast can improve the visibility of the heart chambers, coronary arteries, and surrounding blood vessels. The care team will tell you in advance whether contrast is planned.
  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