 Version 2.66

# 77891-0Left ventricular Ejection fraction by US.2D+Calculated by Teichholz methodActive

Component
Ejection fraction
Property
VFr
Time
Pt
System
Heart.ventricle.left
Scale
Qn
Method
US.2D+Calculated by Teichholz method

Short Name
LV EF 2D Teichholz

## Term Description

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]
Source: Regenstrief LOINC

## Part Description

LP35012-1   Ejection fraction
In cardiovascular physiology, ejection fraction (Ef) is the fraction of blood pumped out of a ventricle with each heart beat. The term ejection fraction applies to both the right and left ventricles; one can speak equally of the left ventricular ejection fraction (LVEF) and the right ventricular ejection fraction (RVEF). Without a qualifier, the term ejection fraction refers specifically to that of the left ventricle. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details. Source: Wikipedia, Ejection fraction (Wikipedia)

## Basic Attributes

Class
CARD.US
Type
Clinical
First Released
Version 2.52
Last Updated
Version 2.54
Order vs. Observation
Observation

Ejection fraction=[(LV end-diastolic volume-LV end-systolic volume)/LV end-diastolic volume]*100

## Language Variants Get Info

zh-CNChinese (China)

## Example Units

Unit Source
% Example UCUM Units

## LOINC FHIR® API Example - CodeSystem Request Get Info

`https://fhir.loinc.org/CodeSystem/\$lookup?system=http://loinc.org&code=77891-0`