79957-7Aortic valve Effective orifice area during systole (by US.doppler+Calculated by continuity Vmax)/Body surface areaActive
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
- zh-CNChinese (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 - it-ITItalian (ITALY)
- Effettiva area dell'orifizio.sistole/Area di superficie corporea:
ArArea: Pt: Valvola aortica: Qn: Eco.doppler+Calcolato da continuità Vmax
Example Units
| Unit | Source |
|---|---|
| cm2/m2 | Example UCUM Units |
LOINC FHIR® API Example - CodeSystem Request Get Info
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=79957-7
LOINC Copyright
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