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 76566-9: Left ventricular Cardiac output by US.M-mode+Calculated by cube method

Name: LOINC Code 76566-9: Left ventricular Cardiac output by US.M-mode+Calculated by cube method
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:56.389Z

76566-9 is a LOINC code used to identify Left ventricular Cardiac output 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 Cardiac output. 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 Cardiac output. 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 Cardiac output by US.M-mode+Calculated by cube method
Cardiac output
Calc; Calculation; CARD.US; Cardiac; Cardio; Cardiology; CO; Echography; Flow; Heart Disease; Hrt; Hrt ventr; L; LT; LV; MM; mmode; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US.M-mode+cube; Ventricular; Volume rate; vRate

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 Cardiac output by US.M-mode+Calculated by cube methodLV Output US.M-mode+cubeCardiac outputCARD.USVRatPtHeart.ventricle.left

Frequently asked questions

Code details

Code76566-9

SystemLOINC

Display nameLeft ventricular Cardiac output by US.M-mode+Calculated by cube method

DescriptionCardiac output

Short nameLV Output US.M-mode+cube

ComponentCardiac output

PropertyVRat

TimingPt

System (specimen)Heart.ventricle.left

ScaleQn

MethodUS.M-mode+Calculated by cube method

ClassCARD.US

Example unitsL/min

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.52

Part names

Cardiac outputVRatPtHeart.ventricle.leftQnUS.M-mode+Calculated by cube methodVolume RatePoint 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.