What is ejection fraction of the heart?

Answer 1

Ejection fraction is a measure of how much blood your heart is effectively pumping. It's actually the measure of the blood contained in your ventricles when they're full (end diastolic volume nor EDV) and the amount remaining in the ventricles after pumping is entirely completed (end systolic volume). So the jection fraction is the amount of blood pumped divided by the EDV and expressed as a fraction Larger numbers are usually better. 50-60% is healthy.

Answer 2

This is what percentage of the blood in the ventricles is being ejected. It tells you how well your ventricles are working. Take stroke volume divided by end diastlic volume to find the ejection fraction.

SV/EDV=EF

Answer 3

The ejection fraction value represents the percentage of blood being pumped out of your heart each time it contracts.

The formula for the ejection fraction is:

EF = SV / EDV,

where SV is the stroke volume, the amount of blood pumped out of the heart, and EDV (end-diastolic volume) is the amount of blood the heart had right before the contraction. It's quite normal to measure Ejection Fraction only for the left ventricle, the one that sends blood to the body.

An ejection fraction of 55-70% is considered normal, 40-55% means there's some damage to the heart, perhaps from a previous heart attack, but may not indicate heart failure.

An EF below 40% may confirm diagnosis of heart failure, and specifically for less than 35%, there is risk of life-threatening heartbeats and sudden cardiac death.