LOINCActive

LOINC Code 8731-2: Ventricular Cardiac output by 2D echo

8731-2 is a LOINC code used to identify Ventricular Cardiac output by 2D echo 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.

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.

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
  • Method: 2D echo

What it does not mean

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

Key facts

  • Ventricular Cardiac output by 2D echo
  • Cardiac output
  • Cardiac; Cardio; Cardiology; CO; Flow; Heart Disease; Hemodynamics; HEMODYNAMICS.MOLEC; Hrt; Hrt ventr; Point in time; QNT; Quan; Quant; Quantitative; Random; Ultrasound; 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

Ventricular Cardiac output by 2D echoHrt ventr Output 2D EchoCardiac outputHEMODYN.MOLECVRatPtHeart.ventricle

Frequently asked questions

Code details

Code8731-2
SystemLOINC
Display nameVentricular Cardiac output by 2D echo
DescriptionCardiac output
Short nameHrt ventr Output 2D Echo
ComponentCardiac output
PropertyVRat
TimingPt
System (specimen)Heart.ventricle
ScaleQn
Method2D echo
ClassHEMODYN.MOLEC
Example unitsL/min
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0h(3)
Last changed2.48

Part names

Cardiac outputVRatPtHeart.ventricleQn2D echoVolume RatePoint in time (spot)Heart ventricle

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 8731-2 | HealthAssure