1. What is ESV Volume?

End-systolic volume (ESV) is the volume of blood in the left ventricle at the end of systole (contraction). It is an important parameter in assessing cardiac function and ejection fraction.

2. How Does the Calculator Work?

The calculator uses the ESV equation:

Where:

• \( LVEDV \) — Left ventricular end-diastolic volume (mL)

Explanation: This equation provides an approximate calculation of end-systolic volume based on left ventricular end-diastolic volume.

3. Importance of ESV Calculation

Details: ESV measurement is crucial for evaluating cardiac function, calculating ejection fraction, and assessing the heart's pumping efficiency.

4. Using the Calculator

Tips: Enter left ventricular end-diastolic volume in mL. The value must be valid (LVEDV > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the clinical significance of ESV?
A: ESV helps in assessing cardiac contractility and is used to calculate ejection fraction, which is a key indicator of heart function.

Q2: How is ESV typically measured?
A: ESV can be measured using echocardiography, cardiac MRI, or other imaging techniques that visualize the heart chambers.

Q3: What are normal ESV values?
A: Normal ESV values vary but are typically around 25-35 mL in healthy adults, though this can vary based on age, sex, and body size.

Q4: How does ESV relate to ejection fraction?
A: Ejection fraction is calculated as (LVEDV - ESV)/LVEDV × 100%, making ESV a critical component in this calculation.

Q5: Are there limitations to this calculation method?
A: This is an approximate calculation. For clinical purposes, direct measurement through imaging techniques is preferred for accuracy.