Ejection Fraction Percentage Calculator

Formula

The formula to calculate the Ejection Fraction Percentage (EF) is:

\[ EF = \left( \frac{SV}{EDV} \right) \times 100 \]

Where:

EF – The ejection fraction percentage.
SV – The stroke volume in milliliters (mL).
EDV – The end-diastolic volume in milliliters (mL).

Definition

Ejection Fraction (EF): The percentage of blood the left ventricle pumps out with each contraction.
Stroke Volume (SV): The amount of blood pumped by the left ventricle in one contraction, measured in milliliters (mL).
End-Diastolic Volume (EDV): The total volume of blood in the left ventricle at the end of diastole, measured in milliliters (mL).

Example

Let's say the stroke volume (SV) is 70 mL and the end-diastolic volume (EDV) is 120 mL. Using the formula:

\[ EF = \left( \frac{70}{120} \right) \times 100 \approx 58.33 \% \]

So, the ejection fraction percentage is approximately 58.33%.

What is Ejection Fraction?

Ejection fraction (EF) is a measurement, expressed as a percentage, of how much blood the left ventricle pumps out with each contraction. It is a key indicator of heart health and function. A normal ejection fraction ranges from 55% to 70%. An ejection fraction below this range may indicate heart disease or heart failure, while an ejection fraction above this range can be a sign of hypertrophic cardiomyopathy or other conditions.