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 81418-6: Left ventricular Maximum twist rate by US 2D

Name: LOINC Code 81418-6: Left ventricular Maximum twist rate by US 2D
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:05.775Z

81418-6 is a LOINC code used to identify Left ventricular Maximum twist rate 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 Twist rate.max. 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 Twist rate.max. 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.2D

What it does not mean

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

Key facts

Left ventricular Maximum twist rate by US 2D
Twist rate.max
2D US; Arbitrary rate; CARD.US; Cardiac; Cardio; Cardiology; Echography; Heart Disease; Hrt; Hrt ventr; L; Largest; LT; LV; Max twist rate; Maximal; Maximum; Peak; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Left ventricular Maximum twist rate by US 2DLV Max twist rate 2D USTwist rate.maxCARD.USARatPtHeart.ventricle.left

Frequently asked questions

Code details

Code81418-6

SystemLOINC

Display nameLeft ventricular Maximum twist rate by US 2D

DescriptionTwist rate.max

Short nameLV Max twist rate 2D US

ComponentTwist rate.max

PropertyARat

TimingPt

System (specimen)Heart.ventricle.left

ScaleQn

MethodUS.2D

ClassCARD.US

Example unitsdeg/s

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.71

Part names

Twist rate.maxARatPtHeart.ventricle.leftQnUS.2DMaximum twist rateArbitrary RatePoint in time (spot)Heart ventricle - leftUltrasound 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.