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Left Ventricular Ejection Fraction by Echocardiography (2-Dimensional)

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

This test measures how well your heart’s left ventricle pumps blood to your body, using ultrasound waves. It helps doctors assess heart function and identify issues like heart failure or weakened pumping ability.

Quick summary

["A lower EF may signal heart problems that need medical attention."]

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

Key facts at a glance

LOINC
8806-2
Short code
LV EF 2D Echo
Synonyms
LV EF 2D Echo
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
d-echo
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 effectively your heart’s left ventricle pumps blood out to your arteries each time it contracts. A normal EF typically ranges between 50% and 70%, but this can vary by individual and clinical context. Lower values may indicate reduced heart performance.

Why Is This Test Important?

Measuring LVEF helps doctors diagnose and monitor conditions like heart failure, coronary artery disease, or cardiomyopathy. It also guides treatment decisions, such as medication adjustments or lifestyle changes.

How Is the Test Performed?

You’ll lie on an exam table while a technician applies gel to your chest. A small device (probe) is placed on your skin to send sound waves that create images of your heart. The test usually takes 15–30 minutes and is painless.

What Does the Result Mean?

Results are expressed as a percentage. A lower EF (e.g., below 40%) may mean your heart isn’t pumping blood efficiently, while a higher EF (e.g., above 50%) suggests normal function. Your doctor will interpret results in relation to your overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: LVEF in Heart Health

Short name

Echocardiogram EF

Frequently asked questions

How often will I need this test?
Frequency depends on your health condition. Some people with heart disease may need LVEF checks every few months or years, while others may only need it once. Your doctor will determine this based on your treatment plan and symptoms.
What are common reasons for getting this test?
Doctors may order LVEF testing if you have symptoms like shortness of breath, fatigue, or swelling; if you’ve been diagnosed with heart disease; or as part of routine monitoring for conditions like high blood pressure or heart failure.
Can I eat or drink before this test?
No special preparation is needed. You can eat and drink normally, but avoid caffeine or alcohol before the test, as they may affect heart rhythm temporarily.
  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