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LV Ejection Fraction (Simplified Quinones Equation)

Calculation


LVEDD mm
LVESD mm
Apex


LVEF %
Normal >55-60% %
Calculate

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Information

An even simpler adaptation uses the commonly measured end-diastolic and end-systolic diameters of the LV in the parasternal long axis view, with a correction of the apex as follows...

LVEF =
LVEDD2 - LVESD2
LVEDD2
* 100% + K

Variable Definition
Input
LVEDD LV end-diastolic dimension (mm)
LVESD LV end-systolic dimension (mm)
K Correction for apical contraction
+10% Normal apex
+5% Hypokinetic apex
+0% Akinetic apex
-5% Dyskinetic apex
-10% Apical aneurysm
Output
LVEF Ejection Fraction (%)
Normal >55-60%

References

Weyman AE. Principles and practice of echocardiography. 2nd ed. 1994 p. 605-6
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Author: Dr. Chi-Ming Chow Developer: Edward Brawer Illustrator: Ellen Ho
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