LOINC
Version 2.68

LP203312-6Effective orifice area during systoleActive

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

Basic Part Properties

Name
Effective orifice area.systole
Type
Component
Created On
2015-11-19
Construct for LOINC Short Name
EOA sys

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=LP203312-6

Language Variants Get Info

zh-CNChinese (CHINA)
有效口面积.收缩期
Synonyms: 有效口(孔、孔口、出口、瓣口)面积.收缩期(心脏收缩期、心缩期)
it-ITItalian (ITALY)
Effettiva area dell'orifizio.sistole