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CT Angiography, Left Ventricular Volume — Intravenous Contrast

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

CT angiography with intravenous contrast is used to measure left-ventricular blood volume and help assess heart function.

Quick summary

["This cardiac CT test helps evaluate the size and pumping function of the heart’s main pumping chamber."]

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

Key facts at a glance

LOINC
87281-2
Short code
CTA LE vv-Bl W contr IV
Synonyms
CTA LE vv-Bl 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 cardiac CT angiography test that uses injected iodinated contrast to measure the blood volume in the left ventricle, the heart’s main pumping chamber. The measurements may also be used to calculate the heart’s ejection fraction.

Why might I need this test?

The test may be ordered to evaluate heart structure and function, investigate symptoms such as shortness of breath or fatigue, or monitor certain heart conditions. It can also help assess chamber size and how effectively the left ventricle pumps blood.

How is the test performed?

You lie on a CT scanner table while contrast material is injected into a vein. The scanner takes rapid images of the heart, and the images are used to calculate left-ventricular volume and related heart-function measurements.

How do I prepare for the test?

Follow the imaging center’s instructions about fasting, medications, and avoiding caffeine. Tell the care team if you have had a previous contrast reaction, kidney disease, thyroid disease, or a contrast allergy, because these factors may affect the test or its preparation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cardiac CT Angiography for Left Ventricular Volume

Frequently asked questions

Is this the same as a routine heart CT scan?
It uses similar CT technology, but the images are specifically evaluated to measure left-ventricular blood volume and heart function.
Why is intravenous contrast used?
The contrast improves the visibility of the heart and blood-filled chambers so the scanner can obtain accurate volume measurements.
Can I have this test if I have a contrast allergy?
Tell the imaging team about any prior contrast reaction before the appointment. The team may recommend additional precautions, use different medication, or select another method if necessary.
  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