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 77902-5: Right ventricular Minor axis at end diastole [Length] by US.2D.A4C

Name: LOINC Code 77902-5: Right ventricular Minor axis at end diastole [Length] by US.2D.A4C
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.755Z

77902-5 is a LOINC code used to identify Right ventricular Minor axis at end diastole [Length] by US.2D.A4C 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 Minor axis.end diastole. It is commonly used with the system or sample type Heart.ventricle.right.

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 Minor axis.end diastole. It is commonly used with the system or sample type Heart.ventricle.right.

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.2D.A4C

What it does not mean

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

Key facts

Right ventricular Minor axis at end diastole [Length] by US.2D.A4C

Minor axis.end diastole

The right ventricular minor axis is measured in the apical four-chamber view as the distance between the lateral right atrial wall and interatrial septum, at the midatrial level defined by half of right atrial long axis. [PMID25559473]

2D US; CARD.US; Cardiac; Cardio; Cardiology; Dias; Diast; Diastoli; Echography; ED; ED minor axis; Heart Disease; Hrt; Hrt ventr; Length; Point in time; QNT; Quan; Quant; Quantitative; R; Random; RT; RV; SAX; short axis; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Ultrasound - 2-dimensional; Ventricular

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

Right ventricular Minor axis at end diastole [Length] by US.2D.A4CRV ED minor axis A4CMinor axis.end diastoleCARD.USLenPtHeart.ventricle.right

Frequently asked questions

Code details

Code77902-5

SystemLOINC

Display nameRight ventricular Minor axis at end diastole [Length] by US.2D.A4C

DescriptionMinor axis.end diastole

Short nameRV ED minor axis A4C

ComponentMinor axis.end diastole

PropertyLen

TimingPt

System (specimen)Heart.ventricle.right

ScaleQn

MethodUS.2D.A4C

ClassCARD.US

Example unitscm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.67

Part names

Minor axis.end diastoleLenPtHeart.ventricle.rightQnUS.2D.A4CMinor axis at end diastoleLengthPoint in time (spot)Heart.ventricle Right

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.