LOINCActiveObservation

LOINC Code 20176-4: Aortic valve Deceleration [Time] by US

20176-4 is a LOINC code used to identify Aortic valve Deceleration [Time] 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 Deceleration. It is commonly used with the system or sample type Aortic valve.

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 Deceleration. It is commonly used with the system or sample type Aortic valve.

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

  • Aortic valve Deceleration [Time] by US
  • Deceleration
  • AO; AoV; AV; CARD.US; Cardio; Cardiology; Dec; DT; Echography; Heart Disease; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound

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

Aortic valve Deceleration [Time] by USAV Decel Time USDecelerationCARD.USTimePtAortic valve

Frequently asked questions

Code details

Code20176-4
SystemLOINC
Display nameAortic valve Deceleration [Time] by US
DescriptionDeceleration
Short nameAV Decel Time US
ComponentDeceleration
PropertyTime
TimingPt
System (specimen)Aortic valve
ScaleQn
MethodUS
ClassCARD.US
Example unitsms
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.48

Part names

DecelerationTimePtAortic valveQnUSTime (e.g. seconds)Point in time (spot)Ultrasound

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 20176-4 | HealthAssure