1. What is Stroke Volume?

Stroke Volume (SV) is the volume of blood pumped from the left ventricle of the heart per beat. It is an important parameter in assessing cardiac function and is used to calculate cardiac output.

2. How Is Stroke Volume Calculated?

The calculator uses the Stroke Volume equation:

Where:

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

Explanation: Stroke Volume is calculated by subtracting the amount of blood remaining in the ventricle after contraction (ESV) from the amount of blood in the ventricle just before contraction (EDV).

3. Importance of Stroke Volume

Details: Stroke Volume is a key determinant of cardiac output (CO = SV × HR). It helps assess ventricular function and is used in diagnosing and monitoring various cardiovascular conditions.

4. Using the Calculator

Tips: Enter EDV and ESV in milliliters (mL). Both values must be positive numbers, with EDV typically being larger than ESV in healthy individuals.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal stroke volume?
A: Normal stroke volume ranges from 50-100 mL per beat in a healthy adult at rest.

Q2: How does stroke volume relate to cardiac output?
A: Cardiac output (CO) is the product of stroke volume (SV) and heart rate (HR): CO = SV × HR.

Q3: What factors affect stroke volume?
A: Preload, afterload, and myocardial contractility are the three primary factors that influence stroke volume.

Q4: How is EDV and ESV measured clinically?
A: These are typically measured using echocardiography, cardiac MRI, or ventriculography.

Q5: What conditions can affect stroke volume?
A: Heart failure, valvular disease, hypertension, and other cardiovascular conditions can significantly alter stroke volume.