What is the normal range of ejection fraction in a healthy adult?

What is the normal range of ejection fraction in a healthy adult?

• A. Approximately 55-70%
• B. 70-85%
• C. 40-50%
• D. 30-40%

Answer: (A)

Ejection fraction is the percentage of blood in the ventricle that is pumped out with each heartbeat, reflecting how strongly the heart contracts. In a healthy adult, the left ventricle ejects about half to most of its filling blood, so the ejection fraction sits in the mid to high 50s up to about 70 percent. That’s why the normal range is roughly 55-70%. The formula is EF = (stroke volume ÷ end-diastolic volume) × 100, and clinicians measure it noninvasively with imaging like echocardiography (and sometimes MRI). Values a bit above 70% can occur in very fit individuals or due to measurement variation, but they’re not the standard reference for normal function. Lower ranges, such as 40-50% or 30-40%, indicate reduced systolic function and potential heart problems.

Ejection fraction is the percentage of blood in the ventricle that is pumped out with each heartbeat, reflecting how strongly the heart contracts. In a healthy adult, the left ventricle ejects about half to most of its filling blood, so the ejection fraction sits in the mid to high 50s up to about 70 percent. That’s why the normal range is roughly 55-70%.

The formula is EF = (stroke volume ÷ end-diastolic volume) × 100, and clinicians measure it noninvasively with imaging like echocardiography (and sometimes MRI). Values a bit above 70% can occur in very fit individuals or due to measurement variation, but they’re not the standard reference for normal function. Lower ranges, such as 40-50% or 30-40%, indicate reduced systolic function and potential heart problems.