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Pulmonary Valve Doppler Velocities, Maximum (Vmax), Systolic and Diastolic

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

A Doppler ultrasound measures blood-flow velocity through the pulmonary valve during systole and diastole to help evaluate valve function.

Quick summary

["This test uses sound waves to assess pulmonary valve blood flow and may help identify valve narrowing or leakage."]

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

Key facts at a glance

LOINC
29419-9
Short code
PV-RU Vmax sys/dias DOP
Synonyms
PV-RU Vmax sys/dias DOP
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
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?

Pulmonary valve Doppler ultrasound is a noninvasive imaging test that measures the speed of blood moving through the valve. The maximum velocity, often called Vmax, is recorded during the heart's systolic and diastolic phases.

Why might I need this test?

This test may be ordered to evaluate a suspected pulmonary valve abnormality, monitor heart conditions, or assess blood flow in congenital heart disease. It is often performed as part of a complete echocardiogram.

How is the test performed?

A technician places an ultrasound probe on the chest and uses sound waves to create images of the heart and pulmonary valve. Doppler technology measures the direction and speed of blood flow, while the maximum velocity reflects how quickly blood passes through the valve.

How do I prepare for the test?

No fasting, blood draw, or special medication changes are usually needed. You may be asked to lie on your side or remain still briefly, and the test is generally painless.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal velocities may indicate narrowing of the pulmonary valve, backward leakage through the valve, or changes in blood-flow and pressure conditions near the heart. Results are interpreted with the rest of the echocardiogram and the person's symptoms and medical history.

Short name

Pulmonary Valve Doppler

Frequently asked questions

What does Vmax mean?
Vmax is the highest measured blood-flow velocity through the pulmonary valve during a heartbeat. It helps clinicians evaluate how easily blood passes through the valve.
What can an abnormal result suggest?
An abnormal result may suggest pulmonary valve narrowing, valve leakage, or other changes in heart blood flow. The finding should be reviewed with the complete ultrasound and other cardiac tests.
Is the test painful or risky?
No. Doppler ultrasound does not use ionizing radiation and usually causes no discomfort, although you may feel mild pressure from the probe.
  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