1. What is Stroke Volume?

Stroke Volume is the amount of blood pumped by the left ventricle of the heart in one contraction. It represents the difference between the end diastolic volume (EDV) and end systolic volume (ESV), providing crucial information about cardiac function and efficiency.

2. How Does the Calculator Work?

The calculator uses the Stroke Volume formula:

Where:

• \( End\ Diastolic\ Volume \) — Volume of blood in the ventricle at the end of diastole (ml)
• \( End\ Systolic\ Volume \) — Volume of blood remaining in the ventricle after systole (ml)

Explanation: The formula calculates the net volume of blood ejected from the ventricle during each heartbeat, which is a key indicator of cardiac performance.

3. Importance of Stroke Volume Calculation

Details: Stroke volume measurement is essential for assessing cardiac output, diagnosing heart conditions, monitoring heart failure patients, and evaluating the effectiveness of cardiovascular treatments and interventions.

4. Using the Calculator

Tips: Enter end diastolic volume and end systolic volume in milliliters. Both values must be valid positive numbers, and EDV must be greater than ESV for a physiologically meaningful result.

5. Frequently Asked Questions (FAQ)

Q1: What is the normal range for stroke volume?
A: Normal stroke volume ranges from 60-100 ml in healthy adults at rest, though this can vary based on body size, fitness level, and other factors.

Q2: How does stroke volume relate to cardiac output?
A: Cardiac output = Stroke Volume × Heart Rate. Stroke volume is a fundamental component in determining how much blood the heart pumps per minute.

Q3: What factors can affect stroke volume?
A: Preload, afterload, contractility, heart rate, and ventricular compliance are the main factors that influence stroke volume.

Q4: How is stroke volume measured clinically?
A: Common methods include echocardiography, cardiac MRI, thermodilution techniques, and impedance cardiography.

Q5: Why might stroke volume be reduced?
A: Reduced stroke volume can indicate heart failure, valve disorders, myocardial infarction, or other cardiac conditions that impair ventricular function.