LOINCActiveObservation

LOINC Code 77901-7: Right ventricular Minor axis at end diastole.parasternal long axis [Length] by US 2D

77901-7 is a LOINC code used to identify Right ventricular Minor axis at end diastole.parasternal long axis [Length] by US 2D 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.parasternal long axis. 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.parasternal long axis. 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

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.parasternal long axis [Length] by US 2D
  • Minor axis.end diastole.parasternal long axis
  • 2D US; CARD.US; Cardiac; Cardio; Cardiology; Dias; Diast; Diastoli; Echography; ED; ED minor axis; ED minor axis PLAX; Heart Disease; Hrt; Hrt ventr; Length; PLAX; 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.parasternal long axis [Length] by US 2DRV ED minor axis PLAX 2D USMinor axis.end diastole.parasternal long axisCARD.USLenPtHeart.ventricle.right

Frequently asked questions

Code details

Code77901-7
SystemLOINC
Display nameRight ventricular Minor axis at end diastole.parasternal long axis [Length] by US 2D
DescriptionMinor axis.end diastole.parasternal long axis
Short nameRV ED minor axis PLAX 2D US
ComponentMinor axis.end diastole.parasternal long axis
PropertyLen
TimingPt
System (specimen)Heart.ventricle.right
ScaleQn
MethodUS.2D
ClassCARD.US
Example unitscm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.54

Part names

Minor axis.end diastole.parasternal long axisLenPtHeart.ventricle.rightQnUS.2DMinor axis at end diastole.parasternal long axisLengthPoint in time (spot)Heart.ventricle RightUltrasound 2D

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.

LOINC Code 77901-7 | HealthAssure