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 77905-8: Left atrial End-systolic volume by US.2D+Calculated by area-length method

Name: LOINC Code 77905-8: Left atrial End-systolic volume by US.2D+Calculated by area-length method
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.755Z

77905-8 is a LOINC code used to identify Left atrial End-systolic volume by US.2D+Calculated by area-length method 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 End-systolic volume. It is commonly used with the system or sample type Heart.atrium.left.

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 End-systolic volume. It is commonly used with the system or sample type Heart.atrium.left.

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+Calculated by area-length method

What it does not mean

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

Key facts

Left atrial End-systolic volume by US.2D+Calculated by area-length method
End-systolic volume
2D US; Atrial; Calc; Calculation; CARD.US; Cardiac; Cardio; Cardiology; Echography; ES vol; Heart Disease; Hrt; L; LA; LAA; LT; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Ultrasound - 2-dimensional; US.2D+A-L; Vol; Volume

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

Left atrial End-systolic volume by US.2D+Calculated by area-length methodLA ES vol US.2D+A-LEnd-systolic volumeCARD.USVolPtHeart.atrium.left

Frequently asked questions

Code details

Code77905-8

SystemLOINC

Display nameLeft atrial End-systolic volume by US.2D+Calculated by area-length method

DescriptionEnd-systolic volume

Short nameLA ES vol US.2D+A-L

ComponentEnd-systolic volume

PropertyVol

TimingPt

System (specimen)Heart.atrium.left

ScaleQn

MethodUS.2D+Calculated by area-length method

ClassCARD.US

Example unitsmL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.52

Part names

End-systolic volumeVolPtHeart.atrium.leftQnUS.2D+Calculated by area-length methodVolumePoint in time (spot)Heart.atrium Left

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.