An LVEF within 55-70% is considered to reflect what about cardiac function?

• A. Hyperdynamic circulation
• B. Mild systolic dysfunction
• C. Normal systolic function
• D. Diastolic dysfunction

Answer: (C)

LVEF measures how much blood the left ventricle pumps out with each heartbeat, reflecting systolic performance. A value in the 55–70% range is normal, meaning the heart is contracting well and ejecting a normal portion of its filled volume. If the EF were significantly lower, that would indicate systolic dysfunction. Diastolic dysfunction involves impaired filling and can occur with a normal EF, but the 55–70% range specifically supports normal systolic function. Hyperdynamic circulation would imply an EF higher than normal or unusually high cardiac output, not the standard normal range.