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 80015-1: Left ventricular Isovolumic relaxation time by US.tissue doppler

Name: LOINC Code 80015-1: Left ventricular Isovolumic relaxation time by US.tissue doppler
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.838Z

80015-1 is a LOINC code used to identify Left ventricular Isovolumic relaxation time by US.tissue doppler 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 Isovolumic relaxation time. 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 Isovolumic relaxation time. 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.tissue doppler

What it does not mean

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

Key facts

Left ventricular Isovolumic relaxation time by US.tissue doppler
Isovolumic relaxation time
CARD.US; CARD.US.DICOM; Cardiac; Cardio; Cardiology; Echography; Heart Disease; Hrt; Hrt ventr; IVRT; L; LT; LV; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; TDI; 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

Left ventricular Isovolumic relaxation time by US.tissue dopplerLV Isovolumic relaxation time TDIIsovolumic relaxation timeCARD.US.DICOMTimePtHeart.ventricle.left

Frequently asked questions

Code details

Code80015-1

SystemLOINC

Display nameLeft ventricular Isovolumic relaxation time by US.tissue doppler

DescriptionIsovolumic relaxation time

Short nameLV Isovolumic relaxation time TDI

ComponentIsovolumic relaxation time

PropertyTime

TimingPt

System (specimen)Heart.ventricle.left

ScaleQn

MethodUS.tissue doppler

ClassCARD.US.DICOM

Example unitsms

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.54

Part names

Isovolumic relaxation timeTimePtHeart.ventricle.leftQnUS.tissue dopplerTime (e.g. seconds)Point 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.