1. What is LVEF Biplane Calculation?

The LVEF (Left Ventricular Ejection Fraction) Biplane calculation estimates the percentage of blood ejected from the left ventricle with each heartbeat. It's a key measure of cardiac function, calculated using end-diastolic and end-systolic volumes from biplane imaging.

2. How Does the Calculator Work?

The calculator uses the LVEF biplane equation:

Where:

• \( LVEDV \) — Left ventricular end-diastolic volume (ml)
• \( LVESV \) — Left ventricular end-systolic volume (ml)

Explanation: The equation calculates the percentage of blood pumped out of the left ventricle during systole compared to its total volume at end-diastole.

3. Importance of LVEF Measurement

Details: LVEF is crucial for assessing cardiac function, diagnosing heart failure, determining prognosis, and guiding treatment decisions in cardiovascular diseases.

4. Using the Calculator

Tips: Enter LVEDV and LVESV in milliliters (ml) obtained from echocardiography, cardiac MRI, or other imaging modalities. LVESV must be less than LVEDV.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal LVEF range?
A: Normal LVEF is typically 55-70%. Below 40% indicates reduced ejection fraction (HFrEF), while 41-49% is borderline (HFmrEF).

Q2: How does biplane method differ from other LVEF calculations?
A: Biplane method uses two orthogonal views (usually apical 4-chamber and 2-chamber) for more accurate volume estimation than single-plane methods.

Q3: When is LVEF measurement most important?
A: Essential for heart failure diagnosis, monitoring chemotherapy cardiotoxicity, and evaluating after myocardial infarction.

Q4: What are limitations of LVEF measurement?
A: May be less accurate with irregular rhythms, poor image quality, or significant regional wall motion abnormalities.

Q5: How often should LVEF be measured?
A: Frequency depends on clinical condition - typically at diagnosis, when symptoms change, and to monitor response to therapy.