Stroke Volume Calculator
Stroke Volume= End Diastolic Volume - End Systolic Volume
(EDV)
(ESV)
This stroke volume calculator calculates the amount of blood, in milliliters (mL) that will be pumped out of the ventricles of the heart with each heart beat.
Stroke volume is the amount of blood that the ventricles of the heart pump out with each heart beat.
Measuring a person's stroke volume is a way or test of measuring the health of a person's heart. The volume of blood which a person pumps out each heart beat tells whether the person has a properly functioning and normal heart or not.
The 2 variables which determine stroke volume are the end diastolic volume (EDV) and the end systolic volume (ESV). Stroke volume is determined according to the formula, Stroke Volume= End Diastolic Volume - End Systolic Volume.
The end diastolic volume is the amount of blood which the ventricles fill up with at the end of diastole. Remember that the heart goes through 2 cycles, over and over again. Diastole is the cycle where the ventricles of the heart fill up with blood. Systole is the cycle when the ventricles contract and eject the blood into the great arteries.
The end systolic volume is the amount of blood which the ventricles contain after systole is completed. This is after the ventricles of the heart have contracted and ejected blood into the great arteries, which is the pulmonary trunk and the aorta.
Both the end diastolic volume (EDV) and the end systolic volume (ESV) are measured in unit milliliters (mL). Being that the ESV simply subtracts from the EDV, the resultant value of stroke volume is in unit milliliters (mL).
Increasing the EDV or decreasing the ESV will increase stroke volume. Decreasing the EDV or increasing the ESV will decrease stroke volume.
To use this calculator, a user just enters in the EDV and the ESV and clicks 'Calculate'. The stroke volume will then automatically be calculated in unit mL.
When a person is normally at rest, the average stroke volume is 70 mL with each beat. Usually the end diastolic volume is about 120mL and the end systolic volume is 50mL. This gives a stroke volume of 120mL-50mL= 70mL.
The electronic device, a pacemaker, may be used to stimulate heart beats in individuals who have irregular heart beat.
Example Calculation
If a person has end diastolic volume of 130mL and a end systolic volume of 50mL, what is the stroke volume of this individual?
So based on the values of the parameters, we use the equation SV= EDV - ESV and substitute in the values into the equation.
Stroke Volume= 130mL-50mL= 80mL
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