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Aortic Valve Maximum Regurgitant Velocity During Diastole

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

A Doppler echocardiography measurement of the maximum speed of backward blood flow through the aortic valve while the heart relaxes.

Quick summary

["This measurement helps assess the presence and severity of aortic valve regurgitation when interpreted with the rest of the echocardiogram."]

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

Key facts at a glance

LOINC
79949-4
Short code
AV Max regurg vel dias
Synonyms
AV Max regurg vel dias
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-doppler-cw
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 Doppler ultrasound measurement of the maximum speed of backward blood flow through the aortic valve during diastole, when the heart relaxes. It is generally reported as part of a transthoracic echocardiogram.

Why might I need this test?

The measurement may be used to evaluate a heart murmur, check for leakage through the aortic valve, or monitor known aortic valve disease. It can also help assess how well the heart is working.

How is the test performed?

A technician uses an ultrasound probe over the chest to create images of the heart. Doppler ultrasound measures the movement and speed of blood flow, including the backward flow caused by an incompletely closed aortic valve.

How do I prepare for the test?

No fasting or special preparation is usually required. Wear comfortable clothing, and tell the care team if you have trouble lying flat or have recently had symptoms such as chest pain, shortness of breath, or fainting.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Aortic Valve Regurgitation Velocity

Frequently asked questions

Does this test require radiation?
No. It is an ultrasound-based measurement and does not use ionizing radiation.
Is a faster aortic regurgitation velocity always more concerning?
Not necessarily. Velocity is interpreted along with other measurements, blood pressure, symptoms, and the overall echocardiogram to assess the valve and heart.
Can I receive the results without the full echocardiogram report?
The velocity is most meaningful with the complete echocardiogram because it is only one part of the assessment. Your clinician should interpret it together with the images and other findings.
  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