Stroke volume is the volume of blood pumped out of the left ventricle of the heart during each systolic cardiac contraction.
The stroke volume is not all the blood contained in the left ventricle; normally, only about two-thirds of the blood in the ventricle is expelled with each beat.
The normal range is 50 to 100 ml.
Formula to calculate stroke volume.
End diastolic volume (EDV) is the measure of blood in the left or right ventricle before the heart contracts.
End-systolic volume (ESV) is the volume of blood in a ventricle at the end of contraction.
Example:
Suppose the ESV of a person is 60ml while her EDV is 130ml. Calculate the person’s stroke volume.
Therefore, the person’s stroke volume is 70ml.
