# Left Ventricular Ejection Fraction (LVEF) Calculator

Estimates the amount of blood pumped out of the left ventricle of the heart with each contraction.

Refer to the text below the tool for more information on the LVEF variables and formula.

The LVEF, the amount of blood put in circulation by the left ventricle of the heart during each heartbeat can be calculated through the stroke volume and left ventricle end diastolic volume.

LVEF is calculated by dividing the stroke volume by the left ventricular end diastolic volume:

`LVEF (%) = SV / LV EDV x 100`

Stroke Volume:*
LV End Diastolic Volume (EDV):*
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Steps on how to print your input & results:

2. Then you can click on the Print button to open a PDF in a separate window with the inputs and results. You can further save the PDF or print it.

Please note that once you have closed the PDF you need to click on the Calculate button before you try opening it again, otherwise the input and/or results may not appear in the pdf.

## LVEF variables and formula

Left ventricular ejection fraction (LVEF) is the central measure of left ventricular systolic function, and is calculated as the fraction of chamber volume ejected in systole (stroke volume) in relation to the volume of the blood in the ventricle at the end of diastole (end-diastolic volume).

`LVEF (%) = SV / LV EDV x 100`

The American Society of Echocardiography and the European Association of Cardiovascular Imaging states the following as normal ranges for two-dimensional echocardiography obtained LVEF:

### LVEF (%) among the male population

■ 52% to 72% Normal range;

■ 41% to 51 Mildly abnormal;

■ 30% to 40% Moderately abnormal;

■ Less than 30% Severely abnormal.

### LVEF (%) among the female population

■ 54% to 74% Normal range;

■ 41% to 53 Mildly Abnormal;

■ 30% to 40% Moderately abnormal;

■ Less than 30% Severely abnormal.

LVEF has a prognostic value in predicting adverse outcomes in patients with cardiovascular conditions such as congestive heart failure or after myocardial infarction.

A reduced LV ejection fraction may be due to weakness of the heart muscle (cardiomyopathy), heart muscle damaged by heart attack, valvular problems or long term chronic high blood pressure.

Ejection fraction is commonly measured by echocardiography but others scans such as cardiac MRI or CT are also employed.

## References

Wandt B, Bojo L, Tolagen K, Wranne B. Echocardiographic assessment of ejection fraction in left ventricular hypertrophy. Heart. 1999; 82(2): 192–198.

Wisneski JA, Pfeil CN, Wyse DG, Mitchell R, Rahimtoola SH, Gertz EW. Left ventricular ejection fraction calculated from volumes and areas: underestimation by area method. Circulation. 1981; 63(1):149-51.

Feng B, Sitek A, Gullberg GT. Calculation of the left ventricular ejection fraction without edge detection: application to small hearts. J Nucl Med. 2002; 43(6):786-94.

Specialty: Cardiology

System: Cardiovascular

Objective: Determination

Type: Calculator

No. Of Variables: 2

Abbreviation: LVEF

Article By: Denise Nedea

Published On: April 9, 2020 · 12:00 AM

Last Checked: April 9, 2020

Next Review: April 9, 2025