Stroke Volume Calculator

How to Use the Stroke Volume Calculator

This Stroke Volume Calculator is designed to help you determine the stroke volume and ejection fraction of the heart, using end-diastolic and end-systolic volumes as inputs. Follow the guidance below to accurately perform these calculations.

Step 1: Prepare Your Input Data

Before using the calculator, ensure you have the necessary volume measurements ready. You will need:

• End-Diastolic Volume (EDV): The volume of blood in the ventricle at the end of filling (diastole).
• End-Systolic Volume (ESV): The volume of blood remaining in the ventricle after contraction (systole).

Step 2: Enter the End-Diastolic Volume (EDV)

Input the EDV in the appropriate field:

• Locate the field labeled End-Diastolic Volume (mL).
• Enter the value. It must be a number between 0 and 300 mL, with precision up to one decimal place.
• If you encounter any issues, ensure that the value complies with the required range and decimal precision.

Step 3: Enter the End-Systolic Volume (ESV)

Next, enter the ESV in the corresponding field:

• Locate the field labeled End-Systolic Volume (mL).
• Enter the value, ensuring it is also between 0 and 300 mL, with one decimal precision.
• Check that the input is valid if any errors arise.

Step 4: Calculate the Stroke Volume

Once both values are entered, the calculator will compute the Stroke Volume automatically using the formula:

• Stroke Volume = End-Diastolic Volume – End-Systolic Volume

The result will be displayed as a number with one decimal place, followed by “mL”.

Step 5: Review the Ejection Fraction

The calculator will also compute the Ejection Fraction, reflecting the percentage of blood pumped out during each heartbeat:

• Ejection Fraction = ((EDV – ESV) / EDV) * 100

This value will appear as a percentage, accurate to one decimal place.

Conclusion

By following these steps, you can efficiently use the Stroke Volume Calculator to assess heart function in terms of stroke volume and ejection fraction. Ensure accuracy in your initial measurements for optimal results.