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LOINC Code 77889-4: Left ventricular Ejection fraction by US.M-mode+Calculated by cube method

77889-4 is a LOINC code used to identify Left ventricular Ejection fraction by US.M-mode+Calculated by cube 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 Ejection fraction. It is commonly used with the system or sample type Heart.ventricle.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 Ejection fraction. It is commonly used with the system or sample type Heart.ventricle.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.M-mode+Calculated by cube method

What it does not mean

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

Key facts

Left ventricular Ejection fraction by US.M-mode+Calculated by cube method
Ejection fraction
This term represents the left ventricular ejection fraction (LVEF) based on left ventricular (LV) end-diastolic and end-systolic volumes as calculated by the Cubed method from measurements taken during M-mode echo. The Cubed method formula for LV end-diastolic volume = (LVIDd)^3, where LVIDd = left ventricular internal dimension at end-diastole, and the formula for LV end-systolic volume = (LVIDs)^3, where LVIDs = left ventricular internal dimension at end-systole. [PMID5017683]
Calc; Calculation; CARD.US; Cardiac; Cardio; Cardiology; Echography; EF; Frac; Fract; Fractionation; Fractions; Heart Disease; Hrt; Hrt ventr; L; LT; LV; LVEF; MM; mmode; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US.M-mode+cube; Ventricular; Volfr; Volume fraction

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 ventricular Ejection fraction by US.M-mode+Calculated by cube methodLV EF US.M-mode+cubeEjection fractionCARD.USVFrPtHeart.ventricle.left

Frequently asked questions

Code details

Code77889-4
SystemLOINC
Display nameLeft ventricular Ejection fraction by US.M-mode+Calculated by cube method
DescriptionEjection fraction
Short nameLV EF US.M-mode+cube
ComponentEjection fraction
PropertyVFr
TimingPt
System (specimen)Heart.ventricle.left
ScaleQn
MethodUS.M-mode+Calculated by cube method
ClassCARD.US
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Ejection fractionVFrPtHeart.ventricle.leftQnUS.M-mode+Calculated by cube methodVolume FractionPoint in time (spot)Heart ventricle - 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.

LOINC Code 77889-4 | HealthAssure