Version 2.78

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

Fully-Specified Name

Component
Effective orifice area.systole/Body surface area
Property
ArArea
Time
Pt
System
Aortic valve
Scale
Qn
Method
US.doppler+Calculated by continuity Vmax

Additional Names

Short Name
AV EOA sys (Continuity Vmax)/BSA

Basic Attributes

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

Language Variants Get Info

Tag Language Translation
es-MX Spanish (Mexico) Área efectiva del orificio sístole / área de superficie corporal:ArArea:Punto temporal:Valvula aortica:Cuantitativo:US.doppler+Calculated by continuity Vmax
it-IT Italian (Italy) Effettiva area dell'orifizio.sistole/Area di superficie corporea:ArArea:Pt:Valvola aortica:Qn:Eco.doppler+Calcolato da continuità Vmax
Synonyms: Area/Area 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/体表面积:面积比: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: BSA 体表面积（Body surface area，BSA） 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） 物体 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 身体表面 身体表面积 身体表面面积;身体表面积;BSA 面;表层;上面;外表;表象;面上 面积比值;面积之比;面积比例;单位面积的单位面积

Example Units

Unit Source
cm2/m2 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=79957-7