77891-0
ClinicalLeft ventricular Ejection fraction by US.2D+Calculated by Teichholz 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 Teichholz method from measurements taken during 2D cardiac echo. The Teichholz formula is used to calculate left ventricular volume as follows: LV end-diastolic volume = [7/2.4 + Dd]x[Dd]^3, where Dd = the left ventricular internal dimension (short axis) as measured at end-diastole, and LV end-systolic volume = [7/2.4 + Ds]x[Ds]^3, where Ds = the left ventricular internal dimension (short axis) as measured at end-systole. [PMID: 1244736]
LOINC 6-Axis Classification
Component
Ejection fraction
Property
VFr
Time Aspect
Pt
System
Heart.ventricle.left
Scale Type
Qn
Method Type
US.2D+Calculated by Teichholz method
Details
Class
CARD.US
Order/Observation
Observation
Short Name
LV EF 2D Teichholz
Related Names
Frequently Asked Questions
What is LOINC code 77891-0?
LOINC code 77891-0 identifies "Left ventricular Ejection fraction by US.2D+Calculated by Teichholz 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 Teichholz method from measurements taken during 2D cardiac echo. The Teichholz formula is used to calculate left ventricular volume as follows: LV end-diastolic volume = [7/2.4 + Dd]x[Dd]^3, where Dd = the left ventricular internal dimension (short axis) as measured at end-diastole, and LV end-systolic volume = [7/2.4 + Ds]x[Ds]^3, where Ds = the left ventricular internal dimension (short axis) as measured at end-systole. [PMID: 1244736]
What does 77891-0 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.