77904-1
ClinicalLeft atrial End-systolic volume by US.2D+Calculated by modified Simpson method
Definition
The modified Simpson method is commonly used for volume measurements in 2D cardiac imaging. It uses the biplane method of disks, meaning that the total volume is calculated by adding together the two-dimensional area measurements of the series of circular or elliptical slices that, taken as a whole, represent the chamber being measured. [PMID: 16376782]
LOINC 6-Axis Classification
Component
End-systolic volume
Property
Vol
Time Aspect
Pt
System
Heart.atrium.left
Scale Type
Qn
Method Type
US.2D+Calculated by modified Simpson method
Details
Class
CARD.US
Order/Observation
Observation
Short Name
LA ES vol US.2D+mod Simpson
Related Names
Frequently Asked Questions
What is LOINC code 77904-1?
LOINC code 77904-1 identifies "Left atrial End-systolic volume by US.2D+Calculated by modified Simpson method". The modified Simpson method is commonly used for volume measurements in 2D cardiac imaging. It uses the biplane method of disks, meaning that the total volume is calculated by adding together the two-dimensional area measurements of the series of circular or elliptical slices that, taken as a whole, represent the chamber being measured. [PMID: 16376782]
What does 77904-1 measure?
This code measures End-systolic volume in Heart.atrium.left. It belongs to the CARD.US class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.