What is the normal range for left ventricular ejection fraction by Simpson analysis in adults?

What is the normal range for left ventricular ejection fraction by Simpson analysis in adults?

• A. 40–60%
• B. 55–70%
• C. 60–80%
• D. 70–90%

Answer: (B)

Simpson analysis uses the biplane disk method from apical views to estimate LV volumes and then EF = (EDV − ESV)/EDV. This approach handles different LV shapes more accurately than single-plane methods, so its normal range is set to about 55–70% in adults. Values below this suggest systolic dysfunction, while higher values are not typical for a normal ventricle. Among the options, 55–70% best fits the standard normal range, making it the correct choice.

Simpson analysis uses the biplane disk method from apical views to estimate LV volumes and then EF = (EDV − ESV)/EDV. This approach handles different LV shapes more accurately than single-plane methods, so its normal range is set to about 55–70% in adults. Values below this suggest systolic dysfunction, while higher values are not typical for a normal ventricle. Among the options, 55–70% best fits the standard normal range, making it the correct choice.