LOINCActiveObservation

LOINC Code 17998-6: Aortic valve Regurgitant jet deceleration [Time] by US.doppler

17998-6 is a LOINC code used to identify Aortic valve Regurgitant jet deceleration [Time] by US.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 Regurgitant jet 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 Regurgitant jet 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.doppler

What it does not mean

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

Key facts

  • Aortic valve Regurgitant jet deceleration [Time] by US.doppler
  • Regurgitant jet deceleration
  • MC685; Time from peak AR gradient to zero baseline
  • AO; AoV; AV; CARD.US; Cardio; Cardiology; Dec; DOP; DT; DUPLEX; Echography; Heart Disease; Point in time; QNT; Quan; Quant; Quantitative; Random; Regurg jet decel; 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 Regurgitant jet deceleration [Time] by US.dopplerAV Regurg jet decel Time DOPRegurgitant jet decelerationCARD.USTimePtAortic valve

Frequently asked questions

Code details

Code17998-6
SystemLOINC
Display nameAortic valve Regurgitant jet deceleration [Time] by US.doppler
DescriptionRegurgitant jet deceleration
Short nameAV Regurg jet decel Time DOP
ComponentRegurgitant jet deceleration
PropertyTime
TimingPt
System (specimen)Aortic valve
ScaleQn
MethodUS.doppler
ClassCARD.US
Example unitsms
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Regurgitant jet decelerationTimePtAortic valveQnUS.dopplerTime (e.g. seconds)Point in time (spot)Ultrasound.doppler

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.