What percentage of ejection fraction is considered normal for the human heart?

The ejection fraction (EF) is a key measurement used to assess the heart's pumping efficiency and overall health. It represents the percentage of blood that is pumped out of the heart's ventricles with each contraction. A normal ejection fraction for a healthy human heart typically ranges from 55% to 70%.

Choosing the range of 60-70% as the normal EF is aligned with clinical standards. Within this range, the heart is considered to be functioning optimally, effectively supplying sufficient blood to meet the body's demands. An EF lower than this range may indicate various forms of heart disease or dysfunction, while an extremely high EF could be seen in specific conditions but is not typically associated with optimal heart function in the general population.

The other ranges, such as 40-50% or lower percentages, signal reduced efficiency and potential heart failure, while ranges above 70% often do not reflect a healthy heart function. Therefore, 60-70% accurately reflects the normal range for ejection fraction, indicating a heart that is effectively pumping blood throughout the body.