What Stroke Volume is and How to Calculate it?This video talks about what stroke Volume is,the difference between end diastolic volume and end systolic volume.
Ventricular stroke volume (SV) is the difference between the ventricular end-diastolic volume (EDV) and the end-systolic volume (ESV).
The EDV is the filled volume of the ventricle prior to contraction and the ESV is the residual volume of blood remaining in the ventricle after ejection.
In a typical heart, the EDV is about 120 ml of blood and the ESV about 50 ml of blood.
The difference in these two volumes, 70 ml, represents the SV.
Therefore, any factor that alters either the EDV or the ESV will change SV.