Version 2.80

Term Description

MC686; Time from peak AR gradient to 1/2 peak gradient

Part Descriptions

LP411015-3   Regurgitant blood flow pressure half-time
Pressure half-time is the time needed for the atrioventricular pressure gradient to reduce to half its initial measurement during ventricular diastole. It is primarily assessed through Doppler echocardiography though more invasive cardiac catherization and provides a means of calculating the approximate mitral valve area and evaluating mitral valve stenosis regurgitation. Caution should be used when applying pressure half-time measurements in patients with prosthetic mitral valves, mitral commissurotomy, tachycardia, arrhythmias, and aortic insufficiency. PMID: 21044983 Source: Regenstrief LOINC

LP6617-7   US.doppler
Doppler ultrasound detects the shift in frequency of ultrasound signals reflected from moving objects. Conventional Doppler techniques assess the velocity of blood flow by measuring high-frequency, low-amplitude signals from small, fast-moving blood cells. PMID: 16534017 Source: Regenstrief LOINC , PMID: 16534017

Fully-Specified Name

Component
Regurgitant blood flow pressure half-time
Property
Time
Time
Pt
System
Aortic valve
Scale
Qn
Method
US.doppler

Additional Names

Long Common Name
Aortic valve Regurgitant blood flow pressure half-time by US.doppler
Short Name
AV Regurg PHT DOP

Basic Attributes

Class
CARD.US
Type
Clinical
First Released
Version 1.0l
Last Updated
Version 2.67 (NAM)
Change Reason
Release 2.67: COMPONENT: Moved regurgitant jet from System to Component as it is not a normal anatomical structure Updated for consistency across terms (from: Reguritant pressure half time, to: Regurgitant blood flow pressure half-time); SYSTEM: Moved regurgitant jet from System to Component as it is not a normal anatomical structure
Order vs. Observation
Observation

Language Variants Get Info

Tag Language Translation
el-GR Greek (Greece) Χρόνος ημίσειας πίεσης ροής αίματος παλινδρόμησης:Time:Pt:Αορτική βαλβίδα:Qn:Υπερηχογράφημα.doppler
Synonyms: Time
es-AR Spanish (Argentina) tiempo medio de presión:tiempo:punto en el tiempo:válvula aórtica.chorro de regurgitación:cuantitativo:ecografía.doppler
es-MX Spanish (Mexico) Presión de flujo sanguíneo regurgitante medio tiempo:Tiempo:Punto temporal:Valvula aortica:Cuantitativo:US.doppler
it-IT Italian (Italy) Flusso sanguigno rigurgitante, pressione emitempo:Tempo:Pt:Valvola aortica:Qn:Eco.doppler
Synonyms: Eco Ecografia cardiaca Ecografia.doppler Emitempo di pressione Pressione emitempo di flusso sanguigno rigurgitante Punto nel tempo (episodio) Tempo (e.g. secondi)
pt-BR Portuguese (Brazil) Tempo de meia pressão:Tempo:Pt:Válvula aórtica.jato regurgitante:Qn:US.Doppler
Synonyms: ; Pres 1/2T; P1/2T; T1/2; PHT; Point in time; Random; AV reg; Stemetic; AR; AoV; AO; Quantitative; QNT; Quant; Quan; DOP; DUPLEX; Ultrasound; ULS; Sonogram; Sonography; Sonograph; Echography; Cardiology
zh-CN Chinese (China) 反流血流压力减半时间:时间:时间点:主动脉瓣:定量型:超声.多普勒
Synonyms: 动态 压差降半时间;压差半降时间;压力减半时间;压力半减时间;压差半减时间 压强 反流（回流、返流、回流性、反流性、逆流、反逆）血流（血流量、血液流量）压力（压强）减半时间 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 心脏病学 心脏病学.超声;心脏超声 心脏超声.多普勒 时刻;随机;随意;瞬间 时间(如秒);时间(如秒数) 流 流量;流速;流体 血;全血 血流量;血液流量 超声检查方法;超声检查法;超声波;超声波检查方法;超声波检查法

Example Units

Unit Source
ms Example UCUM Units
ms REGENSTRIEF

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=18105-7