The patient has an EF of 55%. Which statement about the ejection fraction is correct?

The patient has an EF of 55%. Which statement about the ejection fraction is correct?

• A. EF 55% indicates preserved ejection fraction
• B. EF 55% indicates reduced ejection fraction
• C. EF 20% indicates preserved ejection fraction
• D. EF 85% indicates mid-range ejection fraction

Answer: (A)

Ejection fraction describes the percentage of血 the left ventricle pumps out with each beat, reflecting how well the heart’s systolic function is working. Normal values are typically about 50–70% (often summarized as preserved function). An EF of 55% sits right in that normal range, so it indicates preserved systolic function. Reduced ejection fraction is generally below about 40%, and mid-range has been described roughly in the 40–49% window; an EF of 85% is also preserved but would not be described as mid-range. So the statement that EF 55% indicates preserved ejection fraction is correct.

Ejection fraction describes the percentage of血 the left ventricle pumps out with each beat, reflecting how well the heart’s systolic function is working. Normal values are typically about 50–70% (often summarized as preserved function). An EF of 55% sits right in that normal range, so it indicates preserved systolic function. Reduced ejection fraction is generally below about 40%, and mid-range has been described roughly in the 40–49% window; an EF of 85% is also preserved but would not be described as mid-range. So the statement that EF 55% indicates preserved ejection fraction is correct.