What is the normal ejection fraction range widely cited as?

What is the normal ejection fraction range widely cited as?

• A. 40-60%
• B. 60-80%
• C. 70-90%
• D. 50-70%

Answer: (B)

Ejection fraction is the percentage of blood the left ventricle pumps out with each beat. It’s calculated as stroke volume divided by end-diastolic volume, times 100, and it reflects how well the heart’s pumping function is working. In healthy people, the typical values cluster around the 60s to 70s percent. Many clinical references describe 60-80% as a commonly cited normal range, which broadens the upper and lower limits to cover natural variability between individuals and measurement methods. This helps distinguish normal systolic function from impairment, since lower values generally indicate reduced pumping ability. So, choosing 60-80% aligns with the commonly used, widely cited normal range for ejection fraction. (Other ranges, like 50-70% or 55-70%, appear in some sources, but 60-80% is often cited as the broader, standard reference in practice.)

Ejection fraction is the percentage of blood the left ventricle pumps out with each beat. It’s calculated as stroke volume divided by end-diastolic volume, times 100, and it reflects how well the heart’s pumping function is working.

In healthy people, the typical values cluster around the 60s to 70s percent. Many clinical references describe 60-80% as a commonly cited normal range, which broadens the upper and lower limits to cover natural variability between individuals and measurement methods. This helps distinguish normal systolic function from impairment, since lower values generally indicate reduced pumping ability.

So, choosing 60-80% aligns with the commonly used, widely cited normal range for ejection fraction. (Other ranges, like 50-70% or 55-70%, appear in some sources, but 60-80% is often cited as the broader, standard reference in practice.)