How to Calculate EDV
End-diastolic volume (EDV) is a measurement of how much blood is in either the left or the right ventricle of the heart prior to each heartbeat, or contraction. This measurement is helpful in assessing the heart's bloodflow and effectiveness of its contractions. Although professionals can estimate the end diastolic volume through heart images such as X-rays, you can easily calculate EDV through a mathematical equation when the values of stroke volume and end-systolic volume are known.
Insert the value of stroke volume into the algebraic equation EDV = SV + ESV. In this equation, EDV stands for "end-diastolic volume," SV stands for "stroke volume," and ESV stands for "end-systolic volume." For instance, if the stroke volume has a value of 65, the equation becomes EDV = 65 + ESV.
Insert the value of the end-diastolic volume into the equation. Continuing with the previous example of a stroke volume of 65, if the end-systolic volume is 60, then the equation to find end diastolic volume becomes EDV = 65 + 60.
Calculate the end-diastolic volume by adding the stroke volume and end-systolic volume. According to the example of EDV = 65 + 60, the end-diastolic volume is 125.
You can transform this equation to find stroke volume or end-systolic volume as well, provided you know the value of the other two. To find stroke volume, the equation is SV = EDV - ESV. To find the end-systolic volume, the equation is ESV = EDV - SV.