1. What is the EF Calculator?

The EF (Ejection Fraction) Calculator estimates left ventricular ejection fraction based on EPSS (Echocardiographic Parasternal Short-Axis) measurement. It provides a quick assessment of cardiac function.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( EF \) — Ejection fraction (%)
• \( EPSS \) — Echocardiographic Parasternal Short-Axis measurement (cm)

Explanation: The formula provides an estimate of ejection fraction based on the mitral valve E-point to septal separation measurement.

3. Importance of EF Calculation

Details: Ejection fraction is a crucial measurement in assessing cardiac function, diagnosing heart failure, and determining treatment strategies.

4. Using the Calculator

Tips: Enter EPSS measurement in centimeters. The value must be ≥0. For best results, use precise EPSS measurements from echocardiography.

5. Frequently Asked Questions (FAQ)

Q1: What is EPSS?
A: EPSS (E-point to septal separation) is the distance between the mitral valve E-point and the interventricular septum during early diastole.

Q2: What are normal EF values?
A: Normal EF is generally 55-70%. Below 40% typically indicates reduced ejection fraction heart failure.

Q3: How accurate is this calculation?
A: This provides a quick estimate but may not be as accurate as direct measurement methods like Simpson's biplane.

Q4: When is this method most useful?
A: It's particularly helpful for quick assessments when more sophisticated measurements aren't available.

Q5: Are there limitations to this calculation?
A: Accuracy may be reduced in patients with mitral valve disease or significant left ventricular hypertrophy.