79956-9

Aortic valve Effective orifice area during systole by US.doppler+Calculated by continuity Vmax

Active

Part Description

LP203312-6 Effective orifice area.systole
Cardiac valve area can be measured (orifice area) or indirectly calculated (effective orifice area). Direct measurement can be done on echo, and calculations are based on other measurements such as blood flow volume and velocity. [DICOM] The effective orifice area is calculated based on the equation F=A×V, where F is flow, A is area and V is velocity. The velocity is measured directly with Doppler echo and indirectly during cardiac catheterization based on the Torricelli law from the transvalvular pressure gradient: V=√2gh, where g is the velocity of acceleration resulting from gravity and h is the pressure gradient. Therefore, for area as measured by cardiac catheterization, the formula is A=F/√2gh. PMID: 22547754 Source: Regenstrief LOINC, PMID: 22547754

LOINC Names Get Info

Fully-Specified Name: Effective orifice area.systole:Area:Pt:Aortic valve:Qn:US.doppler+Calculated by continuity Vmax
Long Common Name: Aortic valve Effective orifice area during systole by US.doppler+Calculated by continuity Vmax
Short Name: AV EOA sys Continuity Vmax

Part Model Get Info

Component
Effective orifice area.systole
LP203312-6
- Analyte
  Effective orifice area.systole
  LP203312-6
  - Component Numerator
    Effective orifice area.systole
    LP203312-6
    - Component Numerator Core
      Effective orifice area.systole
      LP203312-6
    - Component Numerator Core Suffix
      NULL
  - Component Denominator
    NULL
    - Component Denominator Core
      NULL
    - Component Denominator Core Suffix
      NULL
- Challenge
  NULL
- Adjustment
  NULL
- Count
  NULL
Property
Area
LP6782-9
Time
Pt
LP6960-1
- Time Core
  Pt
  LP6960-1
- Time Modifier
  NULL
System
Aortic valve
LP7026-0
- System Core
  Aortic valve
  LP7026-0
- Super System
  NULL
Scale
Qn
LP7753-9
Method
US.doppler+Calculated by continuity Vmax
LP203273-0

Basic Attributes

Class: CARD.US.DICOM
Type: Clinical
First Released: Version 2.54
Last Updated: Version 2.67 (MIN)
Order vs. Observation: Observation

Language Variants Get Info

Tag	Language	Translation
el-GR	Greek (Greece)	Επιφάνεια αποτελεσματικού στομίου.συστολή:Επιφάνεια:Pt:Αορτική βαλβίδα:Qn:Υπερηχογράφημα.doppler+Υπολογιζόμενο με βάση τη συνέχεια, μέγιστη ταχύτητα Synonyms: CARD.US CARD.US.DICOM Pt Qn Αορτική βαλβίδα Επιφάνεια Επιφάνεια αποτελεσματικού στομίου.συστολή ΗΠΑ Περιοχή στομίου Υπερηχογράφημα.doppler Υπερηχογράφημα.doppler.υπολογιζόμενο Υπερηχογράφημα.doppler+Υπολογιζόμενο με βάση τη συνέχεια, μέγιστη ταχύτητα Υπολογιζόμενο
es-MX	Spanish (Mexico)	Área efectiva del orificio sístole:Zona:Punto temporal:Valvula aortica:Cuantitativo:US.doppler+Calculated by continuity Vmax
it-IT	Italian (Italy)	Effettiva area dell'orifizio.sistole:Area:Pt:Valvola aortica:Qn:Eco.doppler+Calcolato da continuità Vmax Synonyms: DICOM Simplified Adult Echo Report concepts Eco Ecografia cardiaca Ecografia.doppler Ecografia.doppler.calcolata Punto nel tempo (episodio)
zh-CN	Chinese (China)	有效口面积.收缩期:面积:时间点:主动脉瓣:定量型:超声.多普勒+连续性最大血流速度计算法 Synonyms: 口（孔、孔口、出口、瓣口）面积可用数量表示的;定量性;数值型;数量型;连续数值型标尺孔;孔口;出口;瓣口心脏病学心脏病学.超声;心脏超声心脏超声.多普勒心脏超声.多普勒.计算法时刻;随机;随意;瞬间有效口（孔、孔口、出口、瓣口）面积.收缩期（心脏收缩期、心缩期）计算;计算型方法超声.多普勒+连续性最大血流速度（最大血液流度、最大流度、最大速度）（Vmax）计算法超声检查方法;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
cm2	Example UCUM Units

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

CodeSystem lookup: https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=79956-9

LOINC Copyright

Copyright © Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.