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Pulmonary Valve and Left Ventricular Maximum Diastolic Dimension — Doppler Echocardiography

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

Doppler ultrasound assesses blood flow through the pulmonary valve and measures the left ventricle's largest dimension during diastole, when the heart fills.

Quick summary

["This cardiac ultrasound helps evaluate pulmonary valve blood flow and the size of the left ventricle during relaxation and filling."]

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

Key facts at a glance

LOINC
29421-5
Short code
PV-RL Vmax dias DOP
Synonyms
PV-RL Vmax 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?

This is a cardiac ultrasound assessment that uses Doppler technology to evaluate blood flow through the pulmonary valve. It also measures the maximum dimension of the left ventricle during diastole, when the heart relaxes and fills with blood.

Why might I need this test?

Your clinician may order this test to evaluate heart structure, pulmonary valve function, or signs of pressure changes within the heart. It may be used alongside symptoms, an examination, or other echocardiography findings.

How is the test performed?

A technician applies a small probe to your chest and moves it to different positions to obtain ultrasound images and record blood-flow information. The examination is generally painless and does not use ionizing radiation.

How do I prepare for the test?

No special preparation is usually required. Wear comfortable clothing, and follow any instructions from your healthcare provider, particularly if the test is being performed as part of a broader procedure such as a stress echocardiogram.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal pulmonary valve blood flow may indicate narrowing or incomplete closure of the valve. An enlarged left ventricular diastolic dimension may reflect chamber enlargement caused by impaired filling or weakened heart function, but these findings must be interpreted with the complete echocardiogram, symptoms, and medical history.

Short name

Pulmonary Valve and LV Doppler Assessment

Frequently asked questions

Does this test involve radiation?
No. Doppler echocardiography uses sound waves and does not expose you to ionizing radiation.
Is the examination painful?
It is generally painless and noninvasive. You may feel mild pressure from the ultrasound probe on your chest.
Can I receive the results immediately?
A technician may provide preliminary observations, but the images and measurements are usually reviewed and interpreted by a cardiologist or other qualified clinician.
  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