1. What is the ESV Calculation?

The ESV (End-Systolic Volume) calculation determines the volume of blood remaining in the ventricle at the end of systole. It's calculated by subtracting stroke volume (SV) from end-diastolic volume (EDV).

2. How Does the Calculator Work?

The calculator uses the ESV formula:

Where:

• \( EDV \) — End-Diastolic Volume (mL)
• \( SV \) — Stroke Volume (mL)
• \( ESV \) — End-Systolic Volume (mL)

Explanation: This simple subtraction formula provides the residual blood volume in the ventricle after contraction.

3. Importance of ESV Calculation

Details: ESV is an important cardiac parameter that helps assess ventricular function and cardiac efficiency. It's used in various cardiac assessments and hemodynamic monitoring.

4. Using the Calculator

Tips: Enter both EDV and SV values in mL. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the normal range for ESV?
A: Normal ESV values typically range between 25-50 mL for the left ventricle, though this can vary based on individual factors.

Q2: How is ESV different from EDV?
A: EDV is the volume of blood in the ventricle at the end of diastole (filling phase), while ESV is the volume remaining after systole (contraction phase).

Q3: What factors can affect ESV?
A: Contractility, afterload, preload, and heart rate can all influence ESV values.

Q4: How is ESV used clinically?
A: ESV is used to calculate ejection fraction (EF = SV/EDV × 100%) and assess ventricular function in various cardiac conditions.

Q5: Can ESV be measured directly?
A: While the formula provides a calculation, ESV can be measured directly using imaging techniques like echocardiography, cardiac MRI, or ventriculography.