77889-4
ClinicalLeft ventricular Ejection fraction by US.M-mode+Calculated by cube method
Definition
This term represents the left ventricular ejection fraction (LVEF) based on left ventricular (LV) end-diastolic and end-systolic volumes as calculated by the Cubed method from measurements taken during M-mode echo. The Cubed method formula for LV end-diastolic volume = (LVIDd)^3, where LVIDd = left ventricular internal dimension at end-diastole, and the formula for LV end-systolic volume = (LVIDs)^3, where LVIDs = left ventricular internal dimension at end-systole. [PMID: 5017683]
LOINC 6-Axis Classification
Component
Ejection fraction
Property
VFr
Time Aspect
Pt
System
Heart.ventricle.left
Scale Type
Qn
Method Type
US.M-mode+Calculated by cube method
Details
Class
CARD.US
Order/Observation
Observation
Short Name
LV EF US.M-mode+cube
Related Names
Frequently Asked Questions
What is LOINC code 77889-4?
LOINC code 77889-4 identifies "Left ventricular Ejection fraction by US.M-mode+Calculated by cube method". This term represents the left ventricular ejection fraction (LVEF) based on left ventricular (LV) end-diastolic and end-systolic volumes as calculated by the Cubed method from measurements taken during M-mode echo. The Cubed method formula for LV end-diastolic volume = (LVIDd)^3, where LVIDd = left ventricular internal dimension at end-diastole, and the formula for LV end-systolic volume = (LVIDs)^3, where LVIDs = left ventricular internal dimension at end-systole. [PMID: 5017683]
What does 77889-4 measure?
This code measures Ejection fraction in Heart.ventricle.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.