What is the normal ejection fraction range?

What is the normal ejection fraction range?

• A. 40-60
• B. 60-70
• C. 55-70
• D. 70-85

Answer: (C)

Ejection fraction indicates how much blood the left ventricle pumps out with each heartbeat. It’s calculated as stroke volume divided by end-diastolic volume, times 100, giving a percentage of blood ejected per beat. In healthy adults, the normal range is about 55-70%, which reflects good systolic function. This window is used because it captures typical pumping efficiency: values below roughly 55% suggest some degree of systolic impairment, while values above 70% can occur in highly trained athletes or may reflect measurement variation. Therefore, 55-70% is the standard range used to describe normal ejection fraction.

Ejection fraction indicates how much blood the left ventricle pumps out with each heartbeat. It’s calculated as stroke volume divided by end-diastolic volume, times 100, giving a percentage of blood ejected per beat. In healthy adults, the normal range is about 55-70%, which reflects good systolic function. This window is used because it captures typical pumping efficiency: values below roughly 55% suggest some degree of systolic impairment, while values above 70% can occur in highly trained athletes or may reflect measurement variation. Therefore, 55-70% is the standard range used to describe normal ejection fraction.