What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 11649-1: Fetal Mitral valve E-wave/A-wave US.doppler

Name: LOINC Code 11649-1: Fetal Mitral valve E-wave/A-wave US.doppler
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:22.973Z

11649-1 is a LOINC code used to identify Fetal Mitral valve E-wave/A-wave US.doppler in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component E wave/A wave. It is commonly used with the system or sample type Mitral valve^Fetus.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component E wave/A wave. It is commonly used with the system or sample type Mitral valve^Fetus.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Observation
Method: US.doppler

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Fetal Mitral valve E-wave/A-wave US.doppler
E wave/A wave
Atrial wave; A-wave; Cardio; Cardiology; DOP; DUPLEX; Early wave; Echography; E-wave; Fetal; Gyn; Gynecology; Heart Disease; MV; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Velocity ratio

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Fetal Mitral valve E-wave/A-wave US.dopplerFet MV E-wave/A-wave DOPE wave/A waveOB.USVelRtoPtMitral valve^Fetus

Frequently asked questions

Code details

Code11649-1

SystemLOINC

Display nameFetal Mitral valve E-wave/A-wave US.doppler

DescriptionE wave/A wave

Short nameFet MV E-wave/A-wave DOP

ComponentE wave/A wave

PropertyVelRto

TimingPt

System (specimen)Mitral valve^Fetus

ScaleQn

MethodUS.doppler

ClassOB.US

Example unitsratio

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.54

Part names

E wave/A waveVelRtoPtMitral valve^FetusQnUS.dopplerVelocity RatioPoint in time (spot)Ultrasound.doppler

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.