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LOINC Code 18157-8: Right ventricular anterior wall Thickness during systole by US

18157-8 is a LOINC code used to identify Right ventricular anterior wall Thickness during systole by US 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 Thickness.systole. It is commonly used with the system or sample type Heart.ventricle.right.anterior wall.

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 Thickness.systole. It is commonly used with the system or sample type Heart.ventricle.right.anterior wall.

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

What it does not mean

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

Key facts

  • Right ventricular anterior wall Thickness during systole by US
  • Thickness.systole
  • CARD.US; Cardiac; Cardio; Cardiology; Echography; Heart Disease; Hrt; Hrt ventr; Length; Point in time; QNT; Quan; Quant; Quantitative; R; Random; RT; RV; RV.ant wall; RVAW; RVAWs; RVFWs; RVWs; Sonogram; Sonograph; Sonography; Sys; Syst; Thick; Thickness sys; ULS; Ultrasound; 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

Right ventricular anterior wall Thickness during systole by USRV.ant wall Thickness sys USThickness.systoleCARD.USLenPtHeart.ventricle.right.anterior wall

Frequently asked questions

Code details

Code18157-8
SystemLOINC
Display nameRight ventricular anterior wall Thickness during systole by US
DescriptionThickness.systole
Short nameRV.ant wall Thickness sys US
ComponentThickness.systole
PropertyLen
TimingPt
System (specimen)Heart.ventricle.right.anterior wall
ScaleQn
MethodUS
ClassCARD.US
Example unitsmm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.67

Part names

Thickness.systoleLenPtHeart.ventricle.right.anterior wallQnUSThickness during systoleLengthPoint in time (spot)Heart ventricle Right anterior wallUltrasound

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.