79946-0
Aortic valve PISA velocity during diastole by US.doppler
Active
Part Descriptions
LP203205-2 PISA velocity.diastole
The Proximal Isovelocity Surface Area (PISA) method is based on convergent flow dynamics and the Continuity Principle. Proximal to the orifice, flow converges in hemispheric layers of equal velocity. The flow rate across any of these hemispherical isovelocity surfaces is equal to the area of the surface (which can be calculated from its radius) multiplied by the flow velocity at the surface. Choosing a PISA velocity equal to the aliasing velocity of the system is an easy way to visualize an isovelocity surface (which will appear as the surface where the Doppler color switches between red and blue) and measure the corresponding PISA radius from the center of the orifice to the surface. The Continuity Principle states that in the absence of a leak or additional flow into a conduit, the flow rate will be constant along the length of the conduit, whether the conduit is the heart or the regurgitant jet. So the flow rate through the regurgitant orifice is the same as the flow rate across the PISA surface. Dividing the flow rate by the peak velocity through the orifice (measured using continuous wave Doppler of the regurgitant jet) provides the effective regurgitant orifice area (EROA).
Source: DICOM
LP6617-7 US.doppler
Doppler ultrasound detects the shift in frequency of ultrasound signals reflected from moving objects. Conventional Doppler techniques assess the velocity of blood flow by measuring high-frequency, low-amplitude signals from small, fast-moving blood cells. PMID: 16534017
Source: Regenstrief LOINC,
PMID: 16534017
LOINC Names Get Info
- Fully-Specified Name
- PISA velocity.diastole:
Vel: Pt: Aortic valve: Qn: US.doppler - Long Common Name
- Aortic valve PISA velocity during diastole by US.doppler
- Short Name
- AV PISA velocity dias
Part Model Get Info
- Component
- PISA velocity.diastole
LP203205-2
- Analyte
- PISA velocity.diastole
LP203205-2
- Component Numerator
- PISA velocity.diastole
LP203205-2
- Component Numerator Core
- PISA velocity.diastole
LP203205-2
- Component Numerator Core Suffix
- NULL
- Component Denominator
- NULL
- Component Denominator Core
- NULL
- Component Denominator Core Suffix
- NULL
- Challenge
- NULL
- Adjustment
- NULL
- Count
- NULL
- Property
- Vel
LP6888-4
- 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
LP6617-7
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) | Ταχύτητα PISA.διαστολή: Synonyms: CARD.US CARD.US.DICOM Pt Qn Vel Αορτική βαλβίδα ΗΠΑ Ταχύτητα PISA.διαστολή Υπερηχογράφημα.doppler |
| es-MX | Spanish (Mexico) | Diástole de velocidad de PISA: |
| it-IT | Italian (Italy) | Velocita PISA.diastole: Synonyms: DICOM Simplified Adult Echo Report concepts Eco Ecografia cardiaca Ecografia.doppler Punto nel tempo (episodio) Velocità (distanza/tempo) Velocita PISA durante diastole |
| zh-CN | Chinese (China) | PISA 速度.舒张期: Synonyms: PISA 速度（速率）.舒张期（心脏舒张期、 |
Example Units
| Unit | Source |
|---|---|
| cm/s | Example UCUM Units |
LOINC Terminology Service (API) using HL7® FHIR® Get Info
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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://