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 79947-8: Aortic valve Pressure half time during diastole by US.doppler continuous wave

Name: LOINC Code 79947-8: Aortic valve Pressure half time during diastole by US.doppler continuous wave
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.838Z

79947-8 is a LOINC code used to identify Aortic valve Pressure half time during diastole by US.doppler continuous wave 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 Pressure half time.diastole. 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 Pressure half time.diastole. 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.CW

What it does not mean

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

Key facts

Aortic valve Pressure half time during diastole by US.doppler continuous wave
Pressure half time.diastole
AO; AoV; AV; CARD.US; CARD.US.DICOM; Cardio; Cardiology; Continuous wave; Dias; Diast; Diastoli; DOP; DOP.CW; DUPLEX; Echography; Heart Disease; P1/2T; PHT; PHT dias; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; T1/2; 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 Pressure half time during diastole by US.doppler continuous waveAV PHT diasPressure half time.diastoleCARD.US.DICOMTimePtAortic valve

Frequently asked questions

Code details

Code79947-8

SystemLOINC

Display nameAortic valve Pressure half time during diastole by US.doppler continuous wave

DescriptionPressure half time.diastole

Short nameAV PHT dias

ComponentPressure half time.diastole

PropertyTime

TimingPt

System (specimen)Aortic valve

ScaleQn

MethodUS.doppler.CW

ClassCARD.US.DICOM

Example unitsms

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.67

Part names

Pressure half time.diastoleTimePtAortic valveQnUS.doppler.CWPressure half time during diastoleTime (e.g. seconds)Point in time (spot)Ultrasound.doppler.CW

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.