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Left Ventricular Ejection Fraction by Spiral Cardiac MRI

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

This test measures how effectively your heart’s left ventricle pumps blood out to your body, using specialized MRI imaging. It’s often used to assess heart function after a heart attack or other heart conditions.

Quick summary

["LVEF helps doctors determine heart strength and guide treatment plans."]

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

Key facts at a glance

LOINC
8810-4
Short code
LV EF Spiral CT
Synonyms
LV EF Spiral CT
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct-spiral
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 Left Ventricular Ejection Fraction (LVEF)?

LVEF is a percentage that reflects how much blood your heart pumps out with each heartbeat. A lower LVEF may indicate weakened heart muscle, which can cause symptoms like fatigue or shortness of breath. This test is typically done when you have symptoms of heart disease or after a heart attack.

Why Is This Test Done?

Your doctor may order this test to evaluate heart function, monitor heart disease progression, or check for damage after a heart attack. It’s also used to guide decisions about treatments like medications or procedures.

How Is the Test Performed?

You’ll lie on a table inside a large, open MRI machine. The machine uses magnetic fields and radio waves to create detailed images of your heart. You may need to hold your breath briefly during the scan. No needles or injections are used, but you may feel a mild tapping or tapping sensation.

What Are Common Results?

Results are usually expressed as a percentage (e.g., 50%, 30%). A normal range is typically between 50% and 70%, but this can vary. Lower values suggest reduced pumping ability, while higher values indicate strong heart function. Your doctor will interpret results in the context of your health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

LVEF MRI

Frequently asked questions

How long does the MRI take?
The MRI itself usually takes about 15–30 minutes, but the full test may take longer depending on preparation and additional images needed. You may need to fast or avoid certain medications before the scan.
Do I need to prepare for this test?
Yes, your doctor may ask you to avoid eating or drinking for a few hours before the test. You’ll also need to remove any metal objects (like jewelry or a pacemaker) that could interfere with the scan. Wear comfortable clothing.
Will I feel any pain or discomfort?
You may feel a mild tapping sensation during the scan, but you should not feel pain. You’ll be able to communicate with the technician if you need to stop or adjust your position. Some people find the experience relaxing, as the machine makes a soft humming sound.
  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