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Term Description

The effective regurgitant orifice area (EROA) is the size of the defect where the valve leaflets are not aligning normally (coaptation defect). The severity of regurgitation is related to the EROA. EROA can be calculated by the Volumetric method as regurgitant volume divided by the velocity time integral of the regurgitant jet velocity (VTIRegJet), which is recorded by continuous wave Doppler. PMID: 18276823

Part Description

LP72534-8   Effective regurgitant orifice area
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 regurgitant orifice area:Area:Pt:Mitral valve:Qn:US.doppler+Calculated by volumetric method
Long Common Name
Mitral valve Effective regurgitant orifice area by US.doppler+Calculated by volumetric method
Short Name
MV EROA DOP+Calc by vol

Part Model Get Info

  • Component
    Effective regurgitant orifice area
    LP72534-8
    • Analyte
      Effective regurgitant orifice area
      LP72534-8
      • Component Numerator
        Effective regurgitant orifice area
        LP72534-8
        • Component Numerator Core
          Effective regurgitant orifice area
          LP72534-8
        • 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
  • System
    Mitral valve
    LP7424-7
    • System Core
      Mitral valve
      LP7424-7
    • Super System
      NULL
       
  • Scale
    Qn
    LP7753-9
  • Method
    US.doppler+Calculated by volumetric method
    LP189370-2

Basic Attributes

Class
CARD.US
Type
Clinical
First Released
Version 2.52
Last Updated
Version 2.56 (NAM)
Change Reason
Added "area" to the Component to align with the other effective orifice terms
Order vs. Observation
Observation

Formula (Readable)

Effective regurgitant orifice area (EROA) = Regurgitant volume/Velocity time integral of the regurgitant jet velocity

Language Variants Get Info

TagLanguageTranslation
el-GRGreek (Greece)Επιφάνεια αποτελεσματικού στομίου παλινδρόμησης:Επιφάνεια:Pt:Μιτροειδής βαλβίδα:Qn:Υπερηχογράφημα.doppler+Υπολογιζόμενο με ογκομετρική μέθοδο
Synonyms: CARD.US Pt Qn Επιφάνεια Επιφάνεια αποτελεσματικού στομίου παλινδρόμησης Επιφάνεια στομίου παλινδρόμησης ΗΠΑ Μιτροειδής βαλβίδα Περιοχή στομίου Υπερηχογράφημα.doppler Υπερηχογράφημα.doppler.υπολογιζόμενο Υπερηχογράφημα.doppler+Υπολογιζόμενο με ογκομετρική μέθοδο Υπολογιζόμενο
es-MXSpanish (Mexico)Área de orificio regurgitante eficaz:Zona:Punto temporal:La válvula mitral:Cuantitativo:US.doppler+Calculated by volumetric method
it-ITItalian (Italy)Area orifizio rigurgitante effettivo:Area:Pt:Valvola mitrale:Qn:Eco.doppler+Calcolato da metodo volumetrico
Synonyms: Eco Ecografia cardiaca Ecografia.doppler Ecografia.doppler.calcolata Punto nel tempo (episodio)
zh-CNChinese (China)有效反流口:面积:时间点:二尖瓣:定量型:超声.多普勒+容积计算法
Synonyms: 僧帽瓣 反流（回流、返流、回流性、反流性、逆流、反逆）口（孔、孔口、出口、瓣口）面积（大小） 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 有效反流（回流、返流、回流性、反流性、逆流、反逆）口（孔、孔口、出口、瓣口） 计算;计算型方法 超声.多普勒+容积（容量、体积）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

UnitSource
cm2Example UCUM Units

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=77914-0